TW202118691A - Bicycle rear sprocket assembly - Google Patents

Bicycle rear sprocket assembly Download PDF

Info

Publication number
TW202118691A
TW202118691A TW109133511A TW109133511A TW202118691A TW 202118691 A TW202118691 A TW 202118691A TW 109133511 A TW109133511 A TW 109133511A TW 109133511 A TW109133511 A TW 109133511A TW 202118691 A TW202118691 A TW 202118691A
Authority
TW
Taiwan
Prior art keywords
sprocket
assembly
bicycle
bicycle rear
rear sprocket
Prior art date
Application number
TW109133511A
Other languages
Chinese (zh)
Other versions
TWI785386B (en
Inventor
藤田寬司
腰山和喜
中西崇
Original Assignee
日商島野股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US15/608,915 external-priority patent/US11059541B2/en
Priority claimed from US15/608,924 external-priority patent/US11332213B2/en
Priority claimed from US15/673,346 external-priority patent/US10377174B2/en
Priority claimed from US15/686,177 external-priority patent/US11179967B2/en
Priority claimed from US15/686,179 external-priority patent/US11220309B2/en
Application filed by 日商島野股份有限公司 filed Critical 日商島野股份有限公司
Publication of TW202118691A publication Critical patent/TW202118691A/en
Application granted granted Critical
Publication of TWI785386B publication Critical patent/TWI785386B/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0015—Hubs for driven wheels
    • B60B27/0021—Hubs for driven wheels characterised by torque transmission means from drive axle
    • B60B27/0026—Hubs for driven wheels characterised by torque transmission means from drive axle of the radial type, e.g. splined key
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0047—Hubs characterised by functional integration of other elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/02—Hubs adapted to be rotatably arranged on axle
    • B60B27/023—Hubs adapted to be rotatably arranged on axle specially adapted for bicycles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/02—Hubs adapted to be rotatably arranged on axle
    • B60B27/04—Hubs adapted to be rotatably arranged on axle housing driving means, e.g. sprockets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/02—Hubs adapted to be rotatably arranged on axle
    • B60B27/04—Hubs adapted to be rotatably arranged on axle housing driving means, e.g. sprockets
    • B60B27/047—Hubs adapted to be rotatably arranged on axle housing driving means, e.g. sprockets comprising a freewheel mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
    • B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
    • B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
    • B62M9/10—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/24—Freewheels or freewheel clutches specially adapted for cycles
    • F16D41/36—Freewheels or freewheel clutches specially adapted for cycles with clutching ring or disc axially shifted as a result of lost motion between actuating members

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Gears, Cams (AREA)
  • Automatic Cycles, And Cycles In General (AREA)
  • Steering Devices For Bicycles And Motorcycles (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

A bicycle rear sprocket assembly comprises at least one sprocket having a total tooth number that is equal to or larger than 15. The at least one sprocket includes at least ten internal spline teeth configured to engage with a bicycle hub assembly.

Description

自行車後鏈輪總成Bicycle rear sprocket assembly

本發明係關於一種自行車後鏈輪總成。The invention relates to a bicycle rear sprocket assembly.

騎車正變成更日益流行的消遣形式以及交通方式。此外，騎車已變成業餘及專業人員兩者之非常流行的競技運動。不論自行車是用於消遣、交通抑或是用於競賽，自行車行業正不斷地改良自行車之各種組件。已經充分重新設計之一個自行車組件為傳動系統。Cycling is becoming an increasingly popular form of pastime and transportation. In addition, cycling has become a very popular competitive sport for both amateurs and professionals. Whether the bicycle is used for recreation, transportation or competition, the bicycle industry is constantly improving the various components of the bicycle. One bicycle component that has been fully redesigned is the transmission system.

根據本發明之第一態樣，一種自行車後鏈輪總成包含具有等於或大於15之一總齒數的至少一個鏈輪。該至少一個鏈輪包括經構形以與一自行車輪轂總成嚙合之至少十個內部花鍵齒。 在根據第一態樣之自行車後鏈輪總成之情況下，相比於包括九個或更少內部花鍵齒之鏈輪，至少十個內部花鍵齒減少施加至至少十個內部花鍵齒中之每一者的旋轉力。此改良至少一個鏈輪之耐久性及/或改良挑選至少一個鏈輪之材料的自由度而不降低至少一個鏈輪之耐久性。 根據本發明之第二態樣，如第一態樣之自行車後鏈輪總成經構形以使得該至少十個內部花鍵齒之一總數目等於或大於20。 在根據第二態樣之自行車後鏈輪總成之情況下，相比於包括九個或更少內部花鍵齒之鏈輪支撐主體，至少二十個內部花鍵齒減少施加至至少二十個內部花鍵齒中之每一者的旋轉力。此改良至少一個鏈輪之耐久性及/或改良挑選至少一個鏈輪之材料的自由度而不降低至少一個鏈輪之耐久性。 根據本發明之第三態樣，如第二態樣之自行車後鏈輪總成經構形以使得該至少十個內部花鍵齒之該總數目等於或大於25。 在根據第三態樣之自行車後鏈輪總成之情況下，相比於包括九個或更少內部花鍵齒之鏈輪，至少二十五個內部花鍵齒進一步減少施加至至少二十五個內部花鍵齒中之每一者的旋轉力。此進一步改良至少一個鏈輪之耐久性及/或改良挑選至少一個鏈輪之材料的自由度而不降低至少一個鏈輪之耐久性。 根據本發明之第四態樣，如第一態樣至第三態樣中任一項之自行車後鏈輪總成經構形以使得該至少十個內部花鍵齒具有一第一內部周節角及不同於該第一內部周節角之一第二內部周節角。 在根據第四態樣之自行車後鏈輪總成之情況下，第一內部周節角與第二內部周節角之間的差異幫助使用者將自行車後鏈輪總成正確地安裝至自行車輪轂總成，尤其是關於自行車後鏈輪總成之每一鏈輪之圓周位置。 根據本發明之第五態樣，如第一態樣至第四態樣中任一項之自行車後鏈輪總成經構形以使得該至少一個鏈輪包括至少十個鏈輪。 在根據第五態樣之自行車後鏈輪總成之情況下，至少十個鏈輪實現自行車後鏈輪之寬範圍。 根據本發明之第六態樣，如第一態樣至第四態樣中任一項之自行車後鏈輪總成經構形以使得該至少一個鏈輪包括至少十一個鏈輪。 在根據第六態樣之自行車後鏈輪總成之情況下，至少十一個鏈輪實現自行車後鏈輪之更寬範圍。 根據本發明之第七態樣，如第一態樣至第四態樣中任一項之自行車後鏈輪總成經構形以使得該至少一個鏈輪包括至少十二個鏈輪。 在根據第七態樣之自行車後鏈輪總成之情況下，至少十二個鏈輪實現自行車後鏈輪之更寬範圍。 根據本發明之第八態樣，如第一態樣至第七態樣中任一項之自行車後鏈輪總成經構形以使得該至少一個鏈輪包括複數個鏈輪及經構形以與一自行車輪轂總成嚙合之至少一個內部花鍵齒。該複數個鏈輪包括具有一齒尖直徑之一最大鏈輪。該至少一個內部花鍵齒具有一內部花鍵頂徑。該內部花鍵頂徑對該齒尖直徑之一比率在0.1至0.2之範圍內。 在根據第八態樣之自行車後鏈輪總成之情況下，比率實現自行車後鏈輪總成之寬範圍，同時改良至少一個鏈輪之耐久性。 根據本發明之第九態樣，如第一態樣至第八態樣中任一項之自行車後鏈輪總成經構形以使得該至少一個鏈輪包括一第一鏈輪及一第二鏈輪。該第一鏈輪具有一第一總齒數。該第二鏈輪具有小於該第一總齒數之一第二總齒數。該第一鏈輪包括至少一個第一移位促進區域以促進一自行車鏈自該第二鏈輪移位至該第一鏈輪之一第一移位操作，且包括至少一個第二移位促進區域以促進該自行車鏈自該第一鏈輪移位至該第二鏈輪之一第二移位操作。 在根據第九態樣之自行車後鏈輪總成之情況下，至少一個第一移位促進區域及至少一個第二移位促進區域使得第一移位操作及第二移位操作更順利。 根據本發明之第十態樣，如第一態樣至第九態樣中任一項之自行車後鏈輪總成進一步包含一鎖定構件，該鎖定構件經構形以阻止安裝於一自行車輪轂總成上之該至少一個鏈輪相對於該自行車後鏈輪總成之一旋轉中心軸線的一軸向移動。該鎖定構件包括一管狀主體部分及一突出部分。該管狀主體部分具有一中心軸線。該突出部分相對於該管狀主體部分之該中心軸線自該管狀主體部分徑向向外延伸。該管狀主體部分具有經構形以與該自行車輪轂總成之一內部帶螺紋部分嚙合的一外部帶螺紋部分。該突出部分經構形以鄰接該至少一個鏈輪。 在根據第十態樣之自行車後鏈輪總成之情況下，有可能將自行車後鏈輪總成附接至自行車輪轂總成以阻止至少一個鏈輪相對於自行車輪轂總成軸向移動。 根據本發明之第十一態樣，如第十態樣之自行車後鏈輪總成經構形以使得該管狀主體部分具有等於或小於26 mm之一第一外徑。 在根據第十一態樣之自行車後鏈輪總成之情況下，第一外徑實現自行車後鏈輪總成之寬範圍，同時阻止至少一個鏈輪相對於自行車輪轂總成之軸向移動。 根據本發明之第十二態樣，如第十一態樣之自行車後鏈輪總成經構形以使得該第一外徑等於或大於25 mm。 在根據第十二態樣之自行車後鏈輪總成之情況下，第一外徑確保鎖定構件之強度，同時實現自行車後鏈輪總成之寬範圍。 根據本發明之第十三態樣，如第十態樣至第十二態樣中任一項之自行車後鏈輪總成經構形以使得該突出部分具有等於或小於32 mm之一第二外徑。 在根據第十三態樣之自行車後鏈輪總成之情況下，第二外徑實現自行車後鏈輪總成之寬範圍，同時阻止至少一個鏈輪相對於自行車輪轂總成軸向移動。 根據本發明之第十四態樣，如第十三態樣之自行車後鏈輪總成經構形以使得該第二外徑等於或大於30 mm。 在根據第十四態樣之自行車後鏈輪總成之情況下，第二外徑確保鎖定構件之強度，同時實現自行車後鏈輪總成之寬範圍。 根據本發明之第十五態樣，如第十態樣至第十四態樣中任一項之自行車後鏈輪總成經構形以使得該鎖定構件具有一工具嚙合部分。 在根據第十五態樣之自行車後鏈輪總成之情況下，有可能易於將鎖定構件附接至自行車輪轂總成且易於將鎖定構件與自行車輪轂總成脫離。 根據本發明之第十六態樣，如第一態樣至第十五態樣中任一項之自行車後鏈輪總成進一步包含一鏈輪支撐件。該至少一個鏈輪包括附接至該鏈輪支撐件之複數個鏈輪。 在根據第十六態樣之自行車後鏈輪總成之情況下，有可能減輕自行車後鏈輪總成之重量。 根據本發明之第十七態樣，如第十六態樣之自行車後鏈輪總成經構形以使得該複數個鏈輪藉由一黏附劑附接至該鏈輪支撐件。 在根據第十七態樣之自行車後鏈輪總成之情況下，有可能減少或去除金屬緊固件。此有效地減輕自行車後鏈輪總成之重量。 根據本發明之第十八態樣，如第十六態樣或第十七態樣之自行車後鏈輪總成經構形以使得該鏈輪支撐件由包括一樹脂材料之一非金屬材料製成。 在根據第十八態樣之自行車後鏈輪總成之情況下，非金屬材料較有效地減輕自行車後鏈輪總成之重量。 根據本發明之第十九態樣，如第一態樣至第十八態樣中任一項之自行車後鏈輪總成進一步包含一後輪轂鄰接表面，該後輪轂鄰接表面經構形以在該自行車後鏈輪總成安裝至一自行車輪轂總成之一狀態中在相對於該自行車後鏈輪總成之一旋轉中心軸線的一軸向方向上鄰接該自行車輪轂總成。該至少一個鏈輪包括複數個鏈輪，該複數個鏈輪包括一最大鏈輪。該最大鏈輪具有一軸向內表面及在該軸向方向上設置於該軸向內表面之一反向側上的一軸向外表面。相比於該軸向內表面，該軸向外表面在該軸向方向上更接近該後輪轂鄰接表面。在該軸向方向上界定於該軸向內表面與該後輪轂鄰接表面之間的一軸向距離等於或大於7 mm。 在根據第十九態樣之自行車後鏈輪總成之情況下，軸向距離實現自行車後鏈輪之寬範圍。 根據本發明之第二十態樣，如第十九態樣之自行車後鏈輪總成經構形以使得該軸向距離等於或大於10 mm。 在根據第二十態樣之自行車後鏈輪總成之情況下，軸向距離進一步實現自行車後鏈輪之更寬範圍。 根據本發明之第二十一態樣，一種自行車後鏈輪總成包含至少一個鏈輪，該至少一個鏈輪具有等於或大於15之一總齒數。該至少一個鏈輪包括經構形以與一自行車輪轂總成嚙合之至少一個內部花鍵齒。該至少一個內部花鍵齒具有等於或小於30 mm之一內部花鍵頂徑。 在根據第二十一態樣之自行車後鏈輪總成之情況下，有可能製造總齒數等於或小於10之自行車後鏈輪。因此，有可能在高速齒輪側上加寬自行車後鏈輪總成之齒輪範圍。第二十一態樣可與第一態樣至第二十態樣中之任一者組合。 根據本發明之第二十二態樣，如第二十一態樣之自行車後鏈輪總成經構形以使得該內部花鍵頂徑等於或大於25 mm。 在根據第二十二態樣之自行車後鏈輪總成之情況下，有可能確保至少一個鏈輪之強度，同時在高速齒輪側上加寬自行車後鏈輪總成之齒輪範圍。 根據本發明之第二十三態樣，如第二十一態樣之自行車後鏈輪總成經構形以使得該內部花鍵頂徑等於或大於29 mm。 在根據第二十三態樣之自行車後鏈輪總成之情況下，有可能進一步確保至少一個鏈輪之強度，同時在高速齒輪側上加寬自行車後鏈輪總成之齒輪範圍。 根據本發明之第二十四態樣，如第二十一態樣至第二十三態樣中任一項之自行車後鏈輪總成經構形以使得該至少一個內部花鍵齒具有等於或小於28 mm之一內部花鍵底徑。 在根據第二十四態樣之自行車後鏈輪總成之情況下，內部花鍵底徑可增大至少一個內部花鍵齒之傳動表面的徑向長度。此改良至少一個鏈輪之強度。 根據本發明之第二十五態樣，如第二十四態樣之自行車後鏈輪總成經構形以使得該內部花鍵底徑等於或大於25 mm。 在根據第二十五態樣之自行車後鏈輪總成之情況下，有可能確保至少一個鏈輪之強度，同時在高速齒輪側上加寬自行車後鏈輪總成之齒輪範圍。 根據本發明之第二十六態樣，如第二十四態樣或第二十五態樣之自行車後鏈輪總成經構形以使得該內部花鍵底徑等於或大於27 mm。 在根據第二十六態樣之自行車後鏈輪總成之情況下，有可能確定地確保至少一個鏈輪之強度，同時在高速齒輪側上加寬自行車後鏈輪總成之齒輪範圍。 根據本發明之第二十七態樣，如第二十一態樣至第二十六態樣中任一項之自行車後鏈輪總成經構形以使得該至少一個內部花鍵齒包括複數個內部花鍵齒，該複數個內部花鍵齒包括用以在踩踏期間傳輸一傳動旋轉力至該自行車輪轂總成的複數個內部花鍵傳動表面。該複數個內部花鍵傳動表面各自包括一徑向最外邊緣、一徑向最內邊緣及自該徑向最外邊緣至該徑向最內邊緣界定之一徑向長度。該等徑向長度之一總和等於或大於7 mm。 在根據第二十七態樣之自行車後鏈輪總成之情況下，有可能增大複數個內部花鍵傳動表面之徑向長度。此改良至少一個鏈輪之強度。 根據本發明之第二十八態樣，如第二十七態樣之自行車後鏈輪總成經構形以使得該等徑向長度之該總和等於或大於10 mm。 在根據第二十八態樣之自行車後鏈輪總成之情況下，有可能進一步增大複數個內部花鍵傳動表面之徑向長度。此改良至少一個鏈輪之強度。 根據本發明之第二十九態樣，如第二十七態樣之自行車後鏈輪總成經構形以使得該等徑向長度之該總和等於或大於15 mm。 在根據第二十九態樣之自行車後鏈輪總成之情況下，有可能進一步增大複數個外部花鍵傳動表面之徑向長度。此進一步改良至少一個鏈輪之強度。 根據本發明之第三十態樣，如第二十一態樣至第二十九態樣中任一項之自行車後鏈輪總成經構形以使得該至少一個鏈輪包括至少十個鏈輪。 在根據第三十態樣之自行車後鏈輪總成之情況下，至少十個鏈輪實現自行車後鏈輪總成之寬範圍。 根據本發明之第三十一態樣，如第二十一態樣至第二十九態樣中任一項之自行車後鏈輪總成經構形以使得該至少一個鏈輪包括至少十一個鏈輪。 在根據第三十一態樣之自行車後鏈輪總成之情況下，至少十一個鏈輪實現自行車後鏈輪總成之寬範圍。 根據本發明之第三十二態樣，如第二十一態樣至第二十九態樣中任一項之自行車後鏈輪總成經構形以使得該至少一個鏈輪包括至少十二個鏈輪。 在根據第三十二態樣之自行車後鏈輪總成之情況下，至少十二個鏈輪實現自行車後鏈輪總成之寬範圍。 根據本發明之第三十三態樣，如第二十一態樣至第三十二態樣中任一項之自行車後鏈輪總成經構形以使得該至少一個鏈輪包括複數個鏈輪。該複數個鏈輪包括具有一齒尖直徑之一最大鏈輪。該內部花鍵主徑對該齒尖直徑之一比率在0.1至0.2之範圍內。 在根據第三十三態樣之自行車後鏈輪總成之情況下，比率實現自行車後鏈輪總成之寬範圍，同時改良至少一個鏈輪之耐久性。 根據本發明之第三十四態樣，如第二十一態樣至第三十二態樣中任一項之自行車後鏈輪總成經構形以使得該至少一個鏈輪包括一第一鏈輪及一第二鏈輪。該第一鏈輪具有一第一總齒數。該第二鏈輪具有小於該第一總齒數之一第二總齒數。該第一鏈輪包括至少一個第一移位促進區域以促進一自行車鏈自該第二鏈輪移位至該第一鏈輪之一第一移位操作，且包括至少一個第二移位促進區域以促進該自行車鏈自該第一鏈輪移位至該第二鏈輪之一第二移位操作。 在根據第三十四態樣之自行車後鏈輪總成之情況下，至少一個第一移位促進區域及至少一個第二移位促進區域使得第一移位操作及第二移位操作更順利。 根據本發明之第三十五態樣，如第二十一態樣至第三十四態樣中任一項之自行車後鏈輪總成進一步包含一鎖定構件，該鎖定構件經構形以阻止安裝於一自行車輪轂總成上之該至少一個鏈輪相對於該自行車後鏈輪總成之一旋轉中心軸線的一軸向移動。該鎖定構件包括一管狀主體部分及一突出部分。該管狀主體部分具有一中心軸線。該突出部分相對於該管狀主體部分之該中心軸線自該管狀主體部分徑向向外延伸。該管狀主體部分具有經構形以與該自行車輪轂總成之一內部帶螺紋部分嚙合的一外部帶螺紋部分。該突出部分經構形以鄰接該至少一個鏈輪。 在根據第三十五態樣之自行車後鏈輪總成之情況下，有可能將自行車後鏈輪總成附接至自行車輪轂總成以阻止至少一個鏈輪相對於自行車輪轂總成軸向移動。 根據本發明之第三十六態樣，如第三十五態樣之自行車後鏈輪總成經構形以使得該管狀主體部分具有等於或小於26 mm之一第一外徑。 在根據第三十六態樣之自行車後鏈輪總成之情況下，第一外徑實現自行車後鏈輪總成之寬範圍，同時阻止至少一個鏈輪相對於自行車輪轂總成之軸向移動。 根據本發明之第三十七態樣，如第三十六態樣之自行車後鏈輪總成經構形以使得該第一外徑等於或大於25 mm。 在根據第三十七態樣之自行車後鏈輪總成之情況下，第一外徑確保鎖定構件之強度，同時實現自行車後鏈輪總成之寬範圍。 根據本發明之第三十八態樣，如第三十五態樣至第三十七態樣中任一項之自行車後鏈輪總成經構形以使得該突出部分具有等於或小於32 mm之一第二外徑。 在根據第三十八態樣之自行車後鏈輪總成之情況下，第二外徑實現自行車後鏈輪總成之寬範圍，同時阻止至少一個鏈輪相對於自行車輪轂總成軸向移動。 根據本發明之第三十九態樣，如第三十八態樣之自行車後鏈輪總成經構形以使得該第二外徑等於或大於30 mm。 在根據第三十九態樣之自行車後鏈輪總成之情況下，第二外徑確保鎖定構件之強度，同時實現自行車後鏈輪總成之寬範圍。 根據本發明之第四十態樣，如第三十五態樣至第三十九態樣中任一項之自行車後鏈輪總成經構形以使得該鎖定構件具有一工具嚙合部分。 在根據第四十態樣之自行車後鏈輪總成之情況下，有可能易於將鎖定構件附接至自行車輪轂總成且易於將鎖定構件與自行車輪轂總成脫離。 根據本發明之第四十一態樣，如第二十一態樣至第四十態樣中任一項之自行車後鏈輪總成進一步包含一鏈輪支撐件。該至少一個鏈輪包括附接至該鏈輪支撐件之複數個鏈輪。 在根據第四十一態樣之自行車後鏈輪總成之情況下，有可能減輕自行車後鏈輪總成之重量。 根據本發明之第四十二態樣，如第四十一態樣之自行車後鏈輪總成經構形以使得該複數個鏈輪藉由一黏附劑附接至該鏈輪支撐件。 在根據第四十二態樣之自行車後鏈輪總成之情況下，有可能減少或去除金屬緊固件。此有效地減輕自行車後鏈輪總成之重量。 根據本發明之第四十三態樣，如第四十一態樣或第四十二態樣之自行車後鏈輪總成經構形以使得該鏈輪支撐件由包括一樹脂材料之一非金屬材料製成。 在根據第四十三態樣之自行車後鏈輪總成之情況下，非金屬材料較有效地減輕自行車後鏈輪總成之重量。 根據本發明之第四十四態樣，如第二十一態樣至第四十三態樣中任一項之自行車後鏈輪總成進一步包含一後輪轂鄰接表面，該後輪轂鄰接表面經構形以在該自行車後鏈輪總成安裝至一自行車輪轂總成之一狀態中在相對於該自行車後鏈輪總成之一旋轉中心軸線的一軸向方向上鄰接該自行車輪轂總成。該至少一個鏈輪包括複數個鏈輪，該複數個鏈輪包括一最大鏈輪。該最大鏈輪具有一軸向內表面及在該軸向方向上設置於該軸向內表面之一反向側上的一軸向外表面。相比於該軸向內表面，該軸向外表面在該軸向方向上更接近該後輪轂鄰接表面。在該軸向方向上界定於該軸向內表面與該後輪轂鄰接表面之間的一軸向距離等於或大於7 mm。 在根據第四十四態樣之自行車後鏈輪總成之情況下，軸向距離實現自行車後鏈輪之寬範圍。 根據本發明之第四十五態樣，如第四十四態樣之自行車後鏈輪總成經構形以使得該軸向距離等於或大於10 mm。 在根據第四十五態樣之自行車後鏈輪總成之情況下，軸向距離進一步實現自行車後鏈輪之較寬範圍。 根據本發明之第四十六態樣，一種自行車後鏈輪總成包含複數個鏈輪、一後輪轂鄰接表面及一軸向距離。該複數個鏈輪包括一最大鏈輪。該最大鏈輪具有一軸向內表面及在相對於該自行車後鏈輪總成之一旋轉中心軸線的一軸向方向上設置於該軸向內表面之一反向側上的一軸向外表面。該後輪轂鄰接表面經構形以在該自行車後鏈輪總成安裝至一自行車輪轂總成之一狀態中在該軸向方向上鄰接該自行車輪轂總成，相比於該軸向內表面，該軸向外表面在該軸向方向上更接近該後輪轂鄰接表面。在該軸向方向上界定於該軸向內表面與該後輪轂鄰接表面之間的該軸向距離等於或大於7 mm。 在根據第四十六態樣之自行車後鏈輪總成之情況下，軸向距離實現自行車後鏈輪之寬範圍。 根據本發明之第四十七態樣，如第四十六態樣之自行車後鏈輪總成經構形以使得該軸向距離等於或大於10 mm。 在根據第四十七態樣之自行車後鏈輪總成之情況下，軸向距離進一步實現自行車後鏈輪之較寬範圍。 根據本發明之第四十八態樣，如第四十六態樣或第四十七態樣之自行車後鏈輪總成經構形以使得在該自行車後鏈輪總成安裝至該自行車輪轂總成之一狀態中，相比於該後輪轂鄰接表面，該軸向內表面經定位成更接近該自行車輪轂總成之一軸向中心平面。 在根據第四十八態樣之自行車後鏈輪總成之情況下，軸向距離實現自行車後鏈輪之較寬範圍。 根據本發明之第四十九態樣，如第四十六態樣至第四十八態樣中任一項之自行車後鏈輪總成經構形以使得該複數個鏈輪之一總數目為12。 在根據第四十九態樣之自行車後鏈輪總成之情況下，複數個鏈輪之總數目實現自行車後鏈輪之寬範圍。 根據本發明之第五十態樣，如第四十六態樣至第四十九態樣中任一項之自行車後鏈輪總成經構形以使得該最大鏈輪之一總齒數等於或大於39。 在根據第五十態樣之自行車後鏈輪總成之情況下，最大鏈輪之總齒數實現實現自行車後鏈輪之寬範圍。 根據本發明之第五十一態樣，如第四十六態樣至第四十九態樣中任一項之自行車後鏈輪總成經構形以使得該最大鏈輪之一總齒數等於或大於45。 在根據第五十一態樣之自行車後鏈輪總成之情況下，最大鏈輪之總齒數實現實現自行車後鏈輪之較寬範圍。According to a first aspect of the present invention, a bicycle rear sprocket assembly includes at least one sprocket having a total number of teeth equal to or greater than 15 teeth. The at least one sprocket includes at least ten internal spline teeth that are configured to mesh with a bicycle hub assembly. In the case of the bicycle rear sprocket assembly according to the first aspect, compared to a sprocket including nine or fewer internal spline teeth, at least ten internal spline teeth are less applied to at least ten internal spline teeth The rotational force of each of the teeth. This improves the durability of the at least one sprocket and/or improves the freedom of selecting the material of the at least one sprocket without reducing the durability of the at least one sprocket. According to a second aspect of the present invention, the bicycle rear sprocket assembly as in the first aspect is configured such that the total number of one of the at least ten internal spline teeth is equal to or greater than 20. In the case of the bicycle rear sprocket assembly according to the second aspect, compared to a sprocket support body including nine or fewer internal spline teeth, at least twenty internal spline teeth are reduced to at least twenty The rotational force of each of the internal spline teeth. This improves the durability of at least one sprocket and/or improves the degree of freedom in selecting the material of at least one sprocket without reducing the durability of at least one sprocket. According to the third aspect of the present invention, the bicycle rear sprocket assembly as in the second aspect is configured such that the total number of the at least ten internal spline teeth is equal to or greater than 25. In the case of the bicycle rear sprocket assembly according to the third aspect, compared to a sprocket including nine or fewer internal spline teeth, at least twenty-five internal spline teeth are further reduced to at least twenty The rotational force of each of the five internal spline teeth. This further improves the durability of the at least one sprocket and/or improves the freedom of selecting the material of the at least one sprocket without reducing the durability of the at least one sprocket. According to a fourth aspect of the present invention, the bicycle rear sprocket assembly as in any one of the first aspect to the third aspect is configured such that the at least ten internal spline teeth have a first internal circumferential section Angle and a second inner circumferential pitch angle that is different from the first inner circumferential pitch angle. In the case of the bicycle rear sprocket assembly according to the fourth aspect, the difference between the first inner circumferential pitch angle and the second inner circumferential pitch angle helps the user to correctly install the bicycle rear sprocket assembly to the bicycle hub The assembly, especially the circumferential position of each sprocket of the bicycle rear sprocket assembly. According to a fifth aspect of the present invention, the bicycle rear sprocket assembly as in any one of the first aspect to the fourth aspect is configured such that the at least one sprocket includes at least ten sprockets. In the case of the bicycle rear sprocket assembly according to the fifth aspect, at least ten sprockets realize the wide range of the bicycle rear sprocket. According to a sixth aspect of the present invention, the bicycle rear sprocket assembly as in any one of the first aspect to the fourth aspect is configured such that the at least one sprocket includes at least eleven sprocket wheels. In the case of the bicycle rear sprocket assembly according to the sixth aspect, at least eleven sprockets realize a wider range of the bicycle rear sprocket. According to a seventh aspect of the present invention, the bicycle rear sprocket assembly as in any one of the first aspect to the fourth aspect is configured such that the at least one sprocket includes at least twelve sprockets. In the case of the bicycle rear sprocket assembly according to the seventh aspect, at least twelve sprockets realize a wider range of the bicycle rear sprocket. According to an eighth aspect of the present invention, the bicycle rear sprocket assembly as in any one of the first aspect to the seventh aspect is configured such that the at least one sprocket includes a plurality of sprockets and is configured to At least one internal spline tooth meshed with a bicycle hub assembly. The plurality of sprockets includes one of the largest sprockets having a tooth tip diameter. The at least one internal spline tooth has an internal spline top diameter. The ratio of the inner spline tip diameter to the tooth tip diameter is in the range of 0.1 to 0.2. In the case of the bicycle rear sprocket assembly according to the eighth aspect, the ratio realizes a wide range of the bicycle rear sprocket assembly while improving the durability of at least one sprocket. According to a ninth aspect of the present invention, the bicycle rear sprocket assembly as in any one of the first aspect to the eighth aspect is configured such that the at least one sprocket includes a first sprocket and a second sprocket Sprocket. The first sprocket has a first total number of teeth. The second sprocket has a second total number of teeth which is less than the first total number of teeth. The first sprocket includes at least one first displacement promotion area to promote a first displacement operation of a bicycle chain from the second sprocket to the first sprocket, and includes at least one second displacement promotion Area to facilitate a second displacement operation of the bicycle chain from the first sprocket to the second sprocket. In the case of the bicycle rear sprocket assembly according to the ninth aspect, the at least one first displacement promotion area and the at least one second displacement promotion area make the first displacement operation and the second displacement operation smoother. According to a tenth aspect of the present invention, the bicycle rear sprocket assembly according to any one of the first aspect to the ninth aspect further includes a locking member configured to prevent installation on a bicycle hub assembly The completed at least one sprocket moves in an axial direction relative to a rotation center axis of the bicycle rear sprocket assembly. The locking member includes a tubular body part and a protruding part. The tubular body part has a central axis. The protruding portion extends radially outward from the tubular body portion with respect to the central axis of the tubular body portion. The tubular body portion has an outer threaded portion that is configured to engage with an inner threaded portion of the bicycle hub assembly. The protrusion is configured to abut the at least one sprocket. In the case of the bicycle rear sprocket assembly according to the tenth aspect, it is possible to attach the bicycle rear sprocket assembly to the bicycle hub assembly to prevent at least one sprocket from axially moving relative to the bicycle hub assembly. According to an eleventh aspect of the present invention, the bicycle rear sprocket assembly as in the tenth aspect is configured such that the tubular body portion has a first outer diameter equal to or less than 26 mm. In the case of the bicycle rear sprocket assembly according to the eleventh aspect, the first outer diameter realizes a wide range of the bicycle rear sprocket assembly while preventing the axial movement of at least one sprocket relative to the bicycle hub assembly. According to the twelfth aspect of the present invention, the bicycle rear sprocket assembly as in the eleventh aspect is configured such that the first outer diameter is equal to or greater than 25 mm. In the case of the bicycle rear sprocket assembly according to the twelfth aspect, the first outer diameter ensures the strength of the locking member while realizing the wide range of the bicycle rear sprocket assembly. According to the thirteenth aspect of the present invention, the bicycle rear sprocket assembly as in any one of the tenth aspect to the twelfth aspect is configured such that the protruding portion has a second aspect equal to or less than 32 mm Outer diameter. In the case of the bicycle rear sprocket assembly according to the thirteenth aspect, the second outer diameter realizes a wide range of the bicycle rear sprocket assembly while preventing at least one sprocket from axially moving relative to the bicycle hub assembly. According to the fourteenth aspect of the present invention, the bicycle rear sprocket assembly as in the thirteenth aspect is configured such that the second outer diameter is equal to or greater than 30 mm. In the case of the bicycle rear sprocket assembly according to the fourteenth aspect, the second outer diameter ensures the strength of the locking member while realizing the wide range of the bicycle rear sprocket assembly. According to the fifteenth aspect of the present invention, the bicycle rear sprocket assembly as in any one of the tenth aspect to the fourteenth aspect is configured such that the locking member has a tool engagement portion. In the case of the bicycle rear sprocket assembly according to the fifteenth aspect, it is possible to easily attach the locking member to the bicycle hub assembly and easily detach the locking member from the bicycle hub assembly. According to the sixteenth aspect of the present invention, the bicycle rear sprocket assembly as in any one of the first aspect to the fifteenth aspect further includes a sprocket support member. The at least one sprocket includes a plurality of sprockets attached to the sprocket support. In the case of the bicycle rear sprocket assembly according to the sixteenth aspect, it is possible to reduce the weight of the bicycle rear sprocket assembly. According to a seventeenth aspect of the present invention, the bicycle rear sprocket assembly as in the sixteenth aspect is configured such that the plurality of sprockets are attached to the sprocket support by an adhesive. In the case of the bicycle rear sprocket assembly according to the seventeenth aspect, it is possible to reduce or remove metal fasteners. This effectively reduces the weight of the rear sprocket assembly of the bicycle. According to the eighteenth aspect of the present invention, the bicycle rear sprocket assembly such as the sixteenth aspect or the seventeenth aspect is configured such that the sprocket support is made of a non-metallic material including a resin material to make. In the case of the bicycle rear sprocket assembly according to the eighteenth aspect, non-metallic materials can effectively reduce the weight of the bicycle rear sprocket assembly. According to a nineteenth aspect of the present invention, the bicycle rear sprocket assembly of any one of the first to eighteenth aspects further includes a rear hub abutting surface, the rear hub abutting surface is configured to When the bicycle rear sprocket assembly is installed in a bicycle hub assembly, it abuts the bicycle hub assembly in an axial direction relative to a rotation center axis of the bicycle rear sprocket assembly. The at least one sprocket includes a plurality of sprockets, and the plurality of sprockets includes a largest sprocket. The largest sprocket has an axial inner surface and an axial outer surface arranged on a reverse side of the axial inner surface in the axial direction. Compared with the axial inner surface, the axial outer surface is closer to the rear hub abutment surface in the axial direction. An axial distance defined between the axial inner surface and the abutting surface of the rear hub in the axial direction is equal to or greater than 7 mm. In the case of the bicycle rear sprocket assembly according to the nineteenth aspect, the axial distance realizes a wide range of the bicycle rear sprocket. According to the twentieth aspect of the present invention, the bicycle rear sprocket assembly as in the nineteenth aspect is configured such that the axial distance is equal to or greater than 10 mm. In the case of the bicycle rear sprocket assembly according to the twentieth aspect, the axial distance further realizes a wider range of the bicycle rear sprocket. According to a twenty-first aspect of the present invention, a bicycle rear sprocket assembly includes at least one sprocket, and the at least one sprocket has a total number of teeth equal to or greater than 15. The at least one sprocket includes at least one internal spline tooth that is configured to mesh with a bicycle hub assembly. The at least one internal spline tooth has an internal spline tip diameter equal to or less than 30 mm. In the case of the bicycle rear sprocket assembly according to the twenty-first aspect, it is possible to manufacture a bicycle rear sprocket with a total number of teeth equal to or less than 10. Therefore, it is possible to widen the gear range of the rear sprocket assembly of the bicycle on the high-speed gear side. The twenty-first aspect can be combined with any one of the first aspect to the twentieth aspect. According to the twenty-second aspect of the present invention, the bicycle rear sprocket assembly as in the twenty-first aspect is configured such that the top diameter of the internal spline is equal to or greater than 25 mm. In the case of the bicycle rear sprocket assembly according to the twenty-second aspect, it is possible to ensure the strength of at least one sprocket while widening the gear range of the bicycle rear sprocket assembly on the high-speed gear side. According to the twenty-third aspect of the present invention, the bicycle rear sprocket assembly as in the twenty-first aspect is configured such that the top diameter of the inner spline is equal to or greater than 29 mm. In the case of the bicycle rear sprocket assembly according to the twenty-third aspect, it is possible to further ensure the strength of at least one sprocket while widening the gear range of the bicycle rear sprocket assembly on the high-speed gear side. According to the twenty-fourth aspect of the present invention, the bicycle rear sprocket assembly of any one of the twenty-first aspect to the twenty-third aspect is configured such that the at least one internal spline tooth has the same Or one of the inner spline bottom diameters less than 28 mm. In the case of the bicycle rear sprocket assembly according to the twenty-fourth aspect, the bottom diameter of the inner spline can increase the radial length of the transmission surface of at least one inner spline tooth. This improves the strength of at least one sprocket. According to the twenty-fifth aspect of the present invention, the bicycle rear sprocket assembly as in the twenty-fourth aspect is configured such that the inner spline bottom diameter is equal to or greater than 25 mm. In the case of the bicycle rear sprocket assembly according to the twenty-fifth aspect, it is possible to ensure the strength of at least one sprocket while widening the gear range of the bicycle rear sprocket assembly on the high-speed gear side. According to the twenty-sixth aspect of the present invention, the bicycle rear sprocket assembly such as the twenty-fourth aspect or the twenty-fifth aspect is configured such that the inner spline bottom diameter is equal to or greater than 27 mm. In the case of the bicycle rear sprocket assembly according to the twenty-sixth aspect, it is possible to surely ensure the strength of at least one sprocket while widening the gear range of the bicycle rear sprocket assembly on the high-speed gear side. According to the twenty-seventh aspect of the present invention, the bicycle rear sprocket assembly as in any one of the twenty-first aspect to the twenty-sixth aspect is configured such that the at least one internal spline tooth includes a plurality of Internal spline teeth, the plurality of internal spline teeth include a plurality of internal spline transmission surfaces for transmitting a transmission rotational force to the bicycle hub assembly during pedaling. Each of the plurality of inner spline transmission surfaces includes a radially outermost edge, a radially innermost edge, and a radial length defined from the radially outermost edge to the radially innermost edge. The sum of one of the radial lengths is equal to or greater than 7 mm. In the case of the bicycle rear sprocket assembly according to the twenty-seventh aspect, it is possible to increase the radial length of the plurality of internal spline transmission surfaces. This improves the strength of at least one sprocket. According to the twenty-eighth aspect of the present invention, the bicycle rear sprocket assembly as in the twenty-seventh aspect is configured such that the sum of the radial lengths is equal to or greater than 10 mm. In the case of the bicycle rear sprocket assembly according to the twenty-eighth aspect, it is possible to further increase the radial length of the plurality of internal spline transmission surfaces. This improves the strength of at least one sprocket. According to the twenty-ninth aspect of the present invention, the bicycle rear sprocket assembly as in the twenty-seventh aspect is configured such that the sum of the radial lengths is equal to or greater than 15 mm. In the case of the bicycle rear sprocket assembly according to the twenty-ninth aspect, it is possible to further increase the radial length of the plurality of external spline transmission surfaces. This further improves the strength of at least one sprocket. According to the thirtieth aspect of the present invention, the bicycle rear sprocket assembly as in any one of the twenty-first aspect to the twenty-ninth aspect is configured such that the at least one sprocket includes at least ten chains wheel. In the case of the bicycle rear sprocket assembly according to the thirtieth aspect, at least ten sprockets realize the wide range of the bicycle rear sprocket assembly. According to the thirty-first aspect of the present invention, the bicycle rear sprocket assembly as in any one of the twenty-first aspect to the twenty-ninth aspect is configured such that the at least one sprocket includes at least eleven Sprocket. In the case of the bicycle rear sprocket assembly according to the thirty-first aspect, at least eleven sprockets realize the wide range of the bicycle rear sprocket assembly. According to the thirty-second aspect of the present invention, the bicycle rear sprocket assembly as in any one of the twenty-first aspect to the twenty-ninth aspect is configured such that the at least one sprocket includes at least twelve Sprocket. In the case of the bicycle rear sprocket assembly according to the thirty-second aspect, at least twelve sprockets realize the wide range of the bicycle rear sprocket assembly. According to the thirty-third aspect of the present invention, the bicycle rear sprocket assembly as in any one of the twenty-first aspect to the thirty-second aspect is configured such that the at least one sprocket includes a plurality of chains wheel. The plurality of sprockets includes one of the largest sprockets having a tooth tip diameter. The ratio of the main diameter of the internal spline to the diameter of the tooth tip is in the range of 0.1 to 0.2. In the case of the bicycle rear sprocket assembly according to the thirty-third aspect, the ratio realizes a wide range of the bicycle rear sprocket assembly while improving the durability of at least one sprocket. According to the thirty-fourth aspect of the present invention, the bicycle rear sprocket assembly as in any one of the twenty-first aspect to the thirty-second aspect is configured such that the at least one sprocket includes a first Sprocket and a second sprocket. The first sprocket has a first total number of teeth. The second sprocket has a second total number of teeth which is less than the first total number of teeth. The first sprocket includes at least one first displacement promotion area to promote a first displacement operation of a bicycle chain from the second sprocket to the first sprocket, and includes at least one second displacement promotion Area to facilitate a second displacement operation of the bicycle chain from the first sprocket to the second sprocket. In the case of the bicycle rear sprocket assembly according to the thirty-fourth aspect, at least one first displacement promotion area and at least one second displacement promotion area make the first displacement operation and the second displacement operation smoother . According to the thirty-fifth aspect of the present invention, the bicycle rear sprocket assembly of any one of the twenty-first aspect to the thirty-fourth aspect further includes a locking member configured to prevent The at least one sprocket mounted on a bicycle hub assembly moves in an axial direction relative to a rotation center axis of the bicycle rear sprocket assembly. The locking member includes a tubular body part and a protruding part. The tubular body part has a central axis. The protruding portion extends radially outward from the tubular body portion with respect to the central axis of the tubular body portion. The tubular body portion has an outer threaded portion that is configured to engage with an inner threaded portion of the bicycle hub assembly. The protrusion is configured to abut the at least one sprocket. In the case of the bicycle rear sprocket assembly according to the thirty-fifth aspect, it is possible to attach the bicycle rear sprocket assembly to the bicycle hub assembly to prevent at least one sprocket from axially moving relative to the bicycle hub assembly . According to the thirty-sixth aspect of the present invention, the bicycle rear sprocket assembly as in the thirty-fifth aspect is configured such that the tubular body portion has a first outer diameter equal to or less than 26 mm. In the case of the bicycle rear sprocket assembly according to the thirty-sixth aspect, the first outer diameter realizes the wide range of the bicycle rear sprocket assembly while preventing the axial movement of at least one sprocket relative to the bicycle hub assembly . According to the thirty-seventh aspect of the present invention, the bicycle rear sprocket assembly as in the thirty-sixth aspect is configured such that the first outer diameter is equal to or greater than 25 mm. In the case of the bicycle rear sprocket assembly according to the thirty-seventh aspect, the first outer diameter ensures the strength of the locking member while realizing the wide range of the bicycle rear sprocket assembly. According to the thirty-eighth aspect of the present invention, the bicycle rear sprocket assembly of any one of the thirty-fifth aspect to the thirty-seventh aspect is configured such that the protruding portion has a size equal to or less than 32 mm One of the second outer diameter. In the case of the bicycle rear sprocket assembly according to the thirty-eighth aspect, the second outer diameter realizes a wide range of the bicycle rear sprocket assembly while preventing at least one sprocket from axially moving relative to the bicycle hub assembly. According to the thirty-ninth aspect of the present invention, the bicycle rear sprocket assembly as in the thirty-eighth aspect is configured such that the second outer diameter is equal to or greater than 30 mm. In the case of the bicycle rear sprocket assembly according to the thirty-ninth aspect, the second outer diameter ensures the strength of the locking member while realizing the wide range of the bicycle rear sprocket assembly. According to the fortieth aspect of the present invention, the bicycle rear sprocket assembly of any one of the thirty-fifth aspect to the thirty-ninth aspect is configured such that the locking member has a tool engagement portion. In the case of the bicycle rear sprocket assembly according to the fortieth aspect, it is possible to easily attach the locking member to the bicycle hub assembly and easily detach the locking member from the bicycle hub assembly. According to the 41st aspect of the present invention, the bicycle rear sprocket assembly as in any one of the 21st aspect to the 40th aspect further includes a sprocket support member. The at least one sprocket includes a plurality of sprockets attached to the sprocket support. In the case of the bicycle rear sprocket assembly according to the 41st aspect, it is possible to reduce the weight of the bicycle rear sprocket assembly. According to the forty-second aspect of the present invention, the bicycle rear sprocket assembly of the forty-first aspect is configured such that the plurality of sprockets are attached to the sprocket support by an adhesive. In the case of the bicycle rear sprocket assembly according to the forty-second aspect, it is possible to reduce or eliminate metal fasteners. This effectively reduces the weight of the rear sprocket assembly of the bicycle. According to the forty-third aspect of the present invention, the bicycle rear sprocket assembly such as the forty-first aspect or the forty-second aspect is configured such that the sprocket support is made of a non-metallic material including a resin material Made of metal materials. In the case of the bicycle rear sprocket assembly according to the forty-third aspect, non-metallic materials can effectively reduce the weight of the bicycle rear sprocket assembly. According to the forty-fourth aspect of the present invention, the bicycle rear sprocket assembly of any one of the twenty-first aspect to the forty-third aspect further includes a rear hub abutting surface, and the rear hub abutting surface is It is configured to abut the bicycle hub assembly in an axial direction relative to a rotation center axis of the bicycle rear sprocket assembly in a state where the bicycle rear sprocket assembly is mounted to a bicycle hub assembly. The at least one sprocket includes a plurality of sprockets, and the plurality of sprockets includes a largest sprocket. The largest sprocket has an axial inner surface and an axial outer surface arranged on a reverse side of the axial inner surface in the axial direction. Compared with the axial inner surface, the axial outer surface is closer to the rear hub abutment surface in the axial direction. An axial distance defined between the axial inner surface and the abutting surface of the rear hub in the axial direction is equal to or greater than 7 mm. In the case of the bicycle rear sprocket assembly according to the forty-fourth aspect, the axial distance realizes a wide range of the bicycle rear sprocket. According to the forty-fifth aspect of the present invention, the bicycle rear sprocket assembly of the forty-fourth aspect is configured such that the axial distance is equal to or greater than 10 mm. In the case of the bicycle rear sprocket assembly according to the forty-fifth aspect, the axial distance further realizes a wider range of the bicycle rear sprocket. According to the forty-sixth aspect of the present invention, a bicycle rear sprocket assembly includes a plurality of sprockets, a rear hub abutting surface and an axial distance. The plurality of sprockets includes a largest sprocket. The largest sprocket has an axial inner surface and an axial outer surface disposed on a reverse side of the axial inner surface in an axial direction relative to a rotation center axis of the bicycle rear sprocket assembly surface. The rear hub abutting surface is configured to abut the bicycle hub assembly in the axial direction in a state where the bicycle rear sprocket assembly is mounted to a bicycle hub assembly, compared to the axial inner surface, The axially outer surface is closer to the rear hub abutment surface in the axial direction. The axial distance defined between the axial inner surface and the rear hub abutting surface in the axial direction is equal to or greater than 7 mm. In the case of the bicycle rear sprocket assembly according to the 46th aspect, the axial distance realizes a wide range of the bicycle rear sprocket. According to the forty-seventh aspect of the present invention, the bicycle rear sprocket assembly as in the forty-sixth aspect is configured such that the axial distance is equal to or greater than 10 mm. In the case of the bicycle rear sprocket assembly according to the forty-seventh aspect, the axial distance further realizes a wider range of the bicycle rear sprocket. According to the forty-eighth aspect of the present invention, the bicycle rear sprocket assembly such as the forty-sixth aspect or the forty-seventh aspect is configured so that the rear sprocket assembly of the bicycle is mounted to the bicycle hub In a state of the assembly, the axial inner surface is positioned closer to an axial center plane of the bicycle hub assembly than the abutting surface of the rear hub. In the case of the bicycle rear sprocket assembly according to the forty-eighth aspect, the axial distance realizes a wider range of the bicycle rear sprocket. According to the forty-ninth aspect of the present invention, the bicycle rear sprocket assembly of any one of the forty-sixth aspect to the forty-eighth aspect is configured such that the total number of one of the plurality of sprockets is Is 12. In the case of the bicycle rear sprocket assembly according to the forty-ninth aspect, the total number of the plural sprockets realizes the wide range of the bicycle rear sprocket. According to the fiftieth aspect of the present invention, the bicycle rear sprocket assembly of any one of the forty-sixth aspect to the forty-ninth aspect is configured such that the total number of teeth of the largest sprocket is equal to or Greater than 39. In the case of the bicycle rear sprocket assembly according to the fiftieth aspect, the total number of teeth of the largest sprocket realizes the wide range of the bicycle rear sprocket. According to the fifty-first aspect of the present invention, the bicycle rear sprocket assembly as in any one of the forty-sixth aspect to the forty-ninth aspect is configured such that the total number of teeth of the largest sprocket is equal to Or greater than 45. In the case of the bicycle rear sprocket assembly according to the fifty-first aspect, the total number of teeth of the largest sprocket realizes a wider range of the bicycle rear sprocket.

本申請案為2017年5月30日申請之美國專利申請案第15/608,924號之部分接續申請案。該申請案之內容以全文引用之方式併入本文中。 現將參看附圖描述實施例，其中相似參考數字指定在各種圖式中之對應或相同元件。 首先參考圖1，根據一實施例之自行車傳動系統10包含自行車輪轂總成12及自行車後鏈輪總成14。自行車輪轂總成12緊固至自行車框架BF。自行車後鏈輪總成14安裝於自行車輪轂總成12上。自行車制動轉子16安裝於自行車輪轂總成12上。 自行車傳動系統10進一步包含曲柄總成18及自行車鏈條20。曲柄總成18包括曲柄軸22、右曲柄臂24、左曲柄臂26及前鏈輪27。右曲柄臂24及左曲柄臂26緊固至曲柄軸22。前鏈輪27緊固至曲柄軸22及右曲柄臂24中之至少一者。自行車鏈條20與前鏈輪27及自行車後鏈輪總成14嚙合以將踩踏力自前鏈輪27傳輸至自行車後鏈輪總成14。曲柄總成18包括前鏈輪27作為所說明實施例中之單一鏈輪。然而，曲柄總成18可包括複數個前鏈輪。自行車後鏈輪總成14為後鏈輪總成。然而，自行車後鏈輪總成14之結構可應用於前鏈輪。 在本申請案中，以下方向性術語「前」、「後」、「向前」、「向後」、「左」、「右」、「橫向」、「向上」及「向下」以及任何其他類似方向性術語係指基於坐在自行車之車座(未展示)上且面向把手(未展示)的使用者(例如，騎乘者)而判定之彼等方向。因此，此等術語在用以描述自行車傳動系統10、自行車輪轂總成12或自行車後鏈輪總成14時，應關於配備有如在水平表面上在直立騎乘位置中所使用之自行車傳動系統10、自行車輪轂總成12或自行車後鏈輪總成14的自行車而加以解譯。 如圖2及圖3中所見，自行車輪轂總成12及自行車後鏈輪總成14具有旋轉中心軸線A1。自行車後鏈輪總成14相對於自行車框架BF (圖1)圍繞旋轉中心軸線A1由自行車輪轂總成12可旋轉地支撐。自行車後鏈輪總成14經構形以與自行車鏈條20嚙合，從而在踩踏期間在自行車鏈條20與自行車後鏈輪總成14之間傳輸傳動旋轉力F1。在踩踏期間，自行車後鏈輪總成14在傳動旋轉方向D11上圍繞旋轉中心軸線A1旋轉。傳動旋轉方向D11係沿自行車輪轂總成12或自行車後鏈輪總成14之圓周方向D1界定。反向旋轉方向D12為傳動旋轉方向D11之相反方向，且係沿圓周方向D1界定。 如圖2中所見，自行車輪轂總成12包含鏈輪支撐主體28。自行車後鏈輪總成14安裝於鏈輪支撐主體28上以在鏈輪支撐主體28與自行車後鏈輪總成14之間傳輸傳動旋轉力F1。自行車輪轂總成12進一步包含輪轂軸30。鏈輪支撐主體28圍繞旋轉中心軸線A1可旋轉地安裝於輪轂軸30上。自行車後鏈輪總成14進一步包含鎖定構件32。鎖定構件32緊固至鏈輪支撐主體28以在平行於旋轉中心軸線A1之軸向方向D2上相對於鏈輪支撐主體28固持自行車後鏈輪總成14。 如圖4中所見，自行車輪轂總成12藉由車輪緊固結構WS緊固至自行車框架BF。輪轂軸30具有通孔30A。車輪緊固結構WS之緊固桿WS1延伸穿過輪轂軸30之通孔30A。輪轂軸30包括第一軸端30B及第二軸端30C。輪轂軸30沿旋轉中心軸線A1在第一軸端30B與第二軸端30C之間延伸。第一軸端30B設置於自行車框架BF之第一框架BF1之第一凹槽BF11中。第二軸端30C設置於自行車框架BF之第二框架BF2之第二凹槽BF21中。輪轂軸30藉由車輪緊固結構WS固持於第一框架BF1與第二框架BF2之間。車輪緊固結構WS包括在所申請之自行車中已知的結構。因此，出於簡潔起見，此處將不作詳細描述。 如圖4及圖5中所見，自行車輪轂總成12進一步包含制動轉子支撐主體34。制動轉子支撐主體34圍繞旋轉中心軸線A1可旋轉地安裝於輪轂軸30上。制動轉子支撐主體34耦接至自行車制動轉子16 (圖1)以將制動旋轉力自自行車制動轉子16傳輸至制動轉子支撐主體34。 如圖5中所見，自行車輪轂總成12進一步包含輪轂主體36。輪轂主體36圍繞旋轉中心軸線A1可旋轉地安裝於輪轂軸30上。在此實施例中，鏈輪支撐主體28為來自輪轂主體36之單獨構件。制動轉子支撐主體34與輪轂主體36一體地設置為單件式整體構件。然而，鏈輪支撐主體28可與輪轂主體36一體地設置。制動轉子支撐主體34可為來自輪轂主體36之單獨構件。 輪轂主體36包括第一凸緣36A及第二凸緣36B。第一輪輻(未展示)耦接至第一凸緣36A。第二輪輻(未展示)耦接至第二凸緣36B。第二凸緣36B在軸向方向D2上與第一凸緣36A間隔開。第一凸緣36A在軸向方向D2上設置於鏈輪支撐主體28與第二凸緣36B之間。第二凸緣36B在軸向方向D2上設置於第一凸緣36A與制動轉子支撐主體34之間。 鎖定構件32包括外部帶螺紋部分32A。鏈輪支撐主體28包括內部帶螺紋部分28A。在鎖定構件32緊固至鏈輪支撐主體28之狀態中，外部帶螺紋部分32A與內部帶螺紋部分28A螺紋嚙合。 如圖6中所見，鎖定構件32經構形以阻止安裝於自行車輪轂總成12上之至少一個鏈輪相對於自行車後鏈輪總成14之旋轉中心軸線A1軸向移動。如圖5中所見，鎖定構件32包括管狀主體部分32C及突出部分32B。管狀主體部分32C具有中心軸線A2。突出部分32B相對於管狀主體部分32C之中心軸線A2自管狀主體部分32C徑向向外延伸。管狀主體部分32C具有經構形以與自行車輪轂總成12之內部帶螺紋部分28A嚙合的外部帶螺紋部分32A。 如圖6中所見，突出部分32B經構形以鄰接至少一個鏈輪。在此實施例中，突出部分32B經構形以鄰接鏈輪SP1。管狀主體部分32C具有等於或小於26 mm之第一外徑ED1。第一外徑ED1等於或大於25 mm。在此實施例中，第一外徑ED1為25.45 mm。然而，第一外徑ED1不限於此實施例及以上範圍。突出部分32B具有等於或小於32 mm之第二外徑ED2。第二外徑ED2等於或大於30 mm。在此實施例中，第二外徑ED2為31.5 mm。然而，第二外徑ED2不限於此實施例及以上範圍。 如圖5中所見，鎖定構件32具有工具嚙合部分32D。工具嚙合部分32D設置於管狀主體部分32C之內周邊表面32C1上以與工具嚙合。工具嚙合部分32D包括設置於管狀主體部分32C之內周邊表面32C1上的複數個工具嚙合凹槽32D1。然而，工具嚙合部分32D之結構不限於此實施例。在所說明之實施例中，工具嚙合部分32D可自鎖定構件32省略，或可具有不同於工具嚙合部分32D之另一形狀。 如圖6中所見，自行車輪轂總成12進一步包含棘輪結構38。鏈輪支撐主體28藉由棘輪結構38可操作地耦接至輪轂主體36。棘輪結構38經構形以將鏈輪支撐主體28耦接至輪轂主體36，從而在踩踏期間使鏈輪支撐主體28連同輪轂主體36在傳動旋轉方向D11 (圖5)上旋轉。棘輪結構38經構形以允許鏈輪支撐主體28在惰轉期間在反向旋轉方向D12 (圖5)上相對於輪轂主體36旋轉。因此，棘輪結構38可解釋為單向聯軸結構38。棘輪結構38包括自行車領域中已知的結構。因此，出於簡潔起見，此處將不作詳細描述。 自行車輪轂總成12包括第一軸承39A及第二軸承39B。第一軸承39A及第二軸承39B設置於鏈輪支撐主體28與輪轂軸30之間以圍繞旋轉中心軸線A1相對於輪轂軸30可旋轉地支撐鏈輪支撐主體28。 在此實施例中，鏈輪支撐主體28、制動轉子支撐主體34及輪轂主體36中之每一者由諸如鋁、鐵或鈦之金屬材料製成。然而，鏈輪支撐主體28、制動轉子支撐主體34及輪轂主體36中之至少一者可由非金屬材料製成。 如圖7及圖8中所見，鏈輪支撐主體28包括經構形以與自行車後鏈輪總成14 (圖6)嚙合之至少一個外部花鍵齒40。鏈輪支撐主體28包括經構形以與自行車後鏈輪總成14 (圖6)嚙合之複數個外部花鍵齒40。亦即，至少一個外部花鍵齒40包括複數個外部花鍵齒40。鏈輪支撐主體28包括經構形以與自行車後鏈輪總成14 (圖6)嚙合之至少九個外部花鍵齒40。鏈輪支撐主體28包括經構形以與自行車後鏈輪總成14 (圖6)嚙合之至少十個外部花鍵齒40。 鏈輪支撐主體28包括具有管狀形狀之基座支撐件41。基座支撐件41沿旋轉中心軸線A1延伸。外部花鍵齒40自基座支撐件41徑向向外延伸。鏈輪支撐主體28包括較大直徑部分42、凸緣44及複數個螺旋外部花鍵齒46。較大直徑部分42及凸緣44自基座支撐件41徑向向外延伸。較大直徑部分42在軸向方向D2上設置於複數個外部花鍵齒40與凸緣44之間。較大直徑部分42及凸緣44在軸向方向D2上設置於複數個外部花鍵齒40與複數個螺旋外部花鍵齒46之間。如圖6中所見，自行車後鏈輪總成14在軸向方向D2上固持於較大直徑部分42與鎖定構件32之突出部分32B之間。較大直徑部分42可具有內部空腔，使得諸如單向聯軸結構之傳動結構可容納於內部空腔內。根據需要，可自自行車輪轂總成12省略較大直徑部分42。 如圖9中所見，至少十個外部花鍵齒40之總數目等於或大於20。至少十個外部花鍵齒40之總數目等於或大於25。在此實施例中，至少十個外部花鍵齒40之總數目為26。然而，外部花鍵齒40之總數目不限於此實施例及以上範圍。 至少十個外部花鍵齒40具有第一外部周節角PA11及第二外部周節角PA12。複數個外部花鍵齒40中之至少兩個外部花鍵齒相對於自行車輪轂總成12之旋轉中心軸線A1以第一外部周節角PA11沿圓周配置。複數個外部花鍵齒40中之至少兩個外部花鍵齒相對於自行車輪轂總成12之旋轉中心軸線A1以第二外部周節角PA12沿圓周配置。在此實施例中，第二外部周節角PA12不同於第一外部周節角PA11。然而，第二外部周節角PA12可實質上等於第一外部周節角PA11。 在此實施例中，外部花鍵齒40係在圓周方向D1上以第一外部周節角PA11配置。外部花鍵齒40中之兩個外部花鍵齒係在圓周方向D1上以第二外部周節角PA12配置。然而，外部花鍵齒40中之至少兩個外部花鍵齒可在圓周方向D1上以另一外部周節角配置。 第一外部周節角PA11在10度至20度之範圍內。第一外部周節角PA11在12度至15度之範圍內。第一外部周節角PA11在13度至14度之範圍內。在此實施例中，第一外部周節角PA11為13.3度。然而，第一外部周節角PA11不限於此實施例及以上範圍。 第二部周節角PA12在5度至30度之範圍內。在此實施例中，第二外部周節角PA12為26度。然而，第二外部周節角PA12不限於此實施例及以上範圍。 外部花鍵齒40具有實質上彼此相同的形狀。外部花鍵齒40具有實質上彼此相同的花鍵大小。當沿旋轉中心軸線A1檢視時，外部花鍵齒40具有實質上彼此相同的輪廓。然而，如圖10中所見，至少十個外部花鍵齒40中之至少一者可具有不同於至少十個外部花鍵齒40中之另一者之第二花鍵形狀的第一花鍵形狀。至少十個外部花鍵齒40中之至少一者可具有不同於至少十個外部花鍵齒40中之另一者之第二花鍵大小的第一花鍵大小。當沿旋轉中心軸線A1檢視時，至少十個外部花鍵齒40中之至少一者可具有不同於至少十個外部花鍵齒40中之另一者之輪廓的輪廓。在圖10中，外部花鍵齒40中之一者具有不同於外部花鍵齒40中之其他齒之花鍵形狀的花鍵形狀。外部花鍵齒40中之一者具有不同於外部花鍵齒40中之其他齒之花鍵大小的花鍵大小。當沿旋轉中心軸線A1檢視時，外部花鍵齒40中之一者具有不同於外部花鍵齒40中之其他齒之輪廓的輪廓。 如圖11中所見，至少十個外部花鍵齒40中之每一者具有外部花鍵傳動表面48及外部花鍵非傳動表面50。複數個外部花鍵齒40包括用以在踩踏期間接收來自自行車後鏈輪總成14 (圖6)之傳動旋轉力F1的複數個外部花鍵傳動表面48。複數個外部花鍵齒40包括複數個外部花鍵非傳動表面50。外部花鍵傳動表面48可與自行車後鏈輪總成14接觸以在踩踏期間接收來自自行車後鏈輪總成14 (圖6)之傳動旋轉力F1。外部花鍵傳動表面48面向反向旋轉方向D12。外部花鍵非傳動表面50在圓周方向D1上設置於外部花鍵傳動表面48之反向側上。外部花鍵非傳動表面50面向傳動旋轉方向D11，從而在踩踏期間不接收來自自行車後鏈輪總成14之傳動旋轉力F1。 至少十個外部花鍵齒40分別具有圓周最大寬度MW1。外部花鍵齒40分別具有圓周最大寬度MW1。圓周最大寬度MW1定義為接收施加至外部花鍵齒40之推力F2的最大寬度。圓周最大寬度MW1定義為基於外部花鍵傳動表面48之直線距離。 複數個外部花鍵傳動表面48各自包括徑向最外邊緣48A及徑向最內邊緣48B。外部花鍵傳動表面48自徑向最外邊緣48A延伸至徑向最內邊緣48B。第一參考圓RC11界定於徑向最內邊緣48B上且以旋轉中心軸線A1為中心。第一參考圓RC11與外部花鍵非傳動表面50在參考點50R處相交。圓周最大寬度MW1在圓周方向D1上自徑向最內邊緣48B直線延伸至參考點50R。 複數個外部花鍵非傳動表面50各自包括徑向最外邊緣50A及徑向最內邊緣50B。外部花鍵非傳動表面50自徑向最外邊緣50A延伸至徑向最內邊緣50B。參考點50R設置於徑向最外邊緣50A與徑向最內邊緣50B之間。然而，參考點50R可與徑向最內邊緣50B重合。 圓周最大寬度MW1之總和等於或大於55 mm。圓周最大寬度MW1之總和等於或大於60 mm。圓周最大寬度MW1之總和等於或大於65 mm。在此實施例中，圓周最大寬度MW1之總和為68 mm。然而，圓周最大寬度MW1之總和不限於此實施例及以上範圍。 如圖12中所見，至少一個外部花鍵齒40具有外部花鍵頂徑DM11。外部花鍵頂徑DM11等於或大於25 mm。外部花鍵頂徑DM11等於或大於29 mm。外部花鍵頂徑DM11等於或小於30 mm。在此實施例中，外部花鍵頂徑DM11為29.6 mm。然而，外部花鍵頂徑DM11不限於此實施例及以上範圍。 至少一個外部花鍵齒40具有外部花鍵底徑DM12。至少一個外部花鍵齒40具有外部花鍵齒根圓RC12，外部花鍵齒根圓RC12具有外部花鍵底徑DM12。然而，外部花鍵齒根圓RC12可具有不同於外部花鍵底徑DM12之另一直徑。外部花鍵底徑DM12等於或小於28 mm。外部花鍵底徑DM12等於或大於25 mm。外部花鍵底徑DM12等於或大於27 mm。在此實施例中，外部花鍵底徑DM12為27.2 mm。然而，外部花鍵底徑DM12不限於此實施例及以上範圍。 較大直徑部分42具有大於外部花鍵頂徑DM11之外徑DM13。外徑DM13在32 mm至40 mm之範圍內。在此實施例中，外徑DM13為35 mm。然而，外徑DM13不限於此實施例。 如圖11中所見，複數個外部花鍵傳動表面48各自包括自徑向最外邊緣48A至徑向最內邊緣48B界定之徑向長度RL11。複數個外部花鍵傳動表面48之徑向長度RL11之總和等於或大於7 mm。徑向長度RL11之總和等於或大於10 mm。徑向長度RL11之總和等於或大於15 mm。在此實施例中，徑向長度RL11之總和為19.5 mm。然而，徑向長度RL11之總和不限於此實施例。 複數個外部花鍵齒40具有徑向長度RL12。徑向長度RL12分別自外部花鍵齒根圓RC12至複數個外部花鍵齒40之徑向最外端40A界定。徑向長度RL12之總和等於或大於12 mm。在此實施例中，徑向長度RL12之總和為31.85 mm。然而，徑向長度RL12之總和不限於此實施例。 至少九個外部花鍵齒40中之至少一者相對於圓周齒尖中心線CL1具有不對稱形狀。圓周齒尖中心線CL1為連接旋轉中心軸線A1與外部花鍵齒40之徑向最外端40A之圓周中心點CP1的線。然而，外部花鍵齒40中之至少一者可相對於圓周齒尖中心線CL1具有對稱形狀。至少九個外部花鍵齒40中之至少一者包含外部花鍵傳動表面48及外部花鍵非傳動表面50。 外部花鍵傳動表面48具有第一外部花鍵表面角AG11。第一外部花鍵表面角AG11界定於外部花鍵傳動表面48與第一徑向線L11之間。第一徑向線L11自自行車輪轂總成12之旋轉中心軸線A1延伸至外部花鍵傳動表面48之徑向最外邊緣48A。第一外部周節角PA11或第二外部周節角PA12界定於相鄰第一徑向線L11 (參見例如圖9)之間。 外部花鍵非傳動表面50具有第二外部花鍵表面角AG12。第二外部花鍵表面角AG12界定於外部花鍵非傳動表面50與第二徑向線L12之間。第二徑向線L12自自行車輪轂總成12之旋轉中心軸線A1延伸至外部花鍵非傳動表面50之徑向最外邊緣50A。 在此實施例中，第二外部花鍵表面角AG12不同於第一外部花鍵表面角AG11。第一外部花鍵表面角AG11小於第二外部花鍵表面角AG12。然而，第一外部花鍵表面角AG11可等於或大於第二外部花鍵表面角AG12。 第一外部花鍵表面角AG11在0度至10度之範圍內。第二外部花鍵表面角AG12在0度至60度之範圍內。在此實施例中，第一外部花鍵表面角AG11為5度。第二外部花鍵表面角AG12為45度。然而，第一外部花鍵表面角AG11及第二外部花鍵表面角AG12不限於此實施例及以上範圍。 如圖13及圖14中所見，制動轉子支撐主體34包括經構形以與自行車制動轉子16 (圖4)嚙合之至少一個額外外部花鍵齒52。在此實施例中，制動轉子支撐主體34包括額外基座支撐件54及複數個額外外部花鍵齒52。額外基座支撐件54具有管狀形狀，且沿旋轉中心軸線A1自輪轂主體36延伸。額外外部花鍵齒52自額外基座支撐件54徑向向外延伸。額外外部花鍵齒52之總數目為52。然而，額外外部花鍵齒52之總數目不限於此實施例。 如圖14中所見，至少一個額外外部花鍵齒52具有額外外部花鍵頂徑DM14。如圖15中所見，額外外部花鍵頂徑DM14大於外部花鍵頂徑DM11。額外外部花鍵頂徑DM14實質上等於較大直徑部分42之外徑DM13。然而，額外外部花鍵頂徑DM14可等於或小於外部花鍵頂徑DM11。額外外部花鍵頂徑DM14可不同於較大直徑部分42之外徑DM13。 如圖16中所見，輪轂軸30包括用以接觸自行車框架BF之軸向接觸表面30B1。在此實施例中，軸向接觸表面30B1可與自行車框架BF之第一框架BF1接觸。第一框架BF1包括框架接觸表面BF12。在自行車輪轂總成12藉由車輪緊固結構WS緊固至自行車框架BF之狀態中，軸向接觸表面30B1與框架接觸表面BF12接觸。 第一軸向長度AL11係相對於旋轉中心軸線A1在軸向方向D2上自軸向接觸表面30B1至較大直徑部分42界定。第一軸向長度AL11在35 mm至41 mm之範圍內。第一軸向長度AL11可等於或大於39 mm。第一軸向長度AL11亦可在35 mm至37 mm之範圍內。在此實施例中，第一軸向長度AL11為36.2 mm。然而，第一軸向長度AL11不限於此實施例及以上範圍。 較大直徑部分42具有在軸向方向D2上離軸向接觸表面30B1最遠的軸向端42A。第二軸向長度AL12係在軸向方向D2上自軸向接觸表面30B1至軸向端42A界定。第二軸向長度AL12在38 mm至47 mm之範圍內。第二軸向長度AL12可在44 mm至45 mm之範圍內。第二軸向長度AL12亦可在40 mm至41 mm之範圍內。在此實施例中，第二軸向長度AL12為40.75 mm。然而，第二軸向長度AL12不限於此實施例及以上範圍。 較大直徑部分42之軸向長度AL13在3 mm至6 mm之範圍內。在此實施例中，軸向長度AL13為4.55 mm。然而，軸向長度AL13不限於此實施例及以上範圍。 如圖17中所見，自行車後鏈輪總成14包含至少一個鏈輪。至少一個鏈輪包括複數個鏈輪。至少一個鏈輪包括至少十個鏈輪。至少一個鏈輪包括至少十一個鏈輪。至少一個鏈輪包括至少十二個鏈輪。複數個鏈輪包括最大鏈輪SP12。最大鏈輪SP12具有齒尖直徑TD1。複數個鏈輪亦包括最小鏈輪SP1。最小鏈輪SP1亦可被稱作鏈輪SP1。最大鏈輪SP12亦可被稱作鏈輪SP12。在此實施例中，至少一個鏈輪進一步包括鏈輪SP2至SP11。鏈輪SP1對應於高速齒輪。鏈輪SP12對應於低速齒輪。在此實施例中，複數個鏈輪之總數目為12。然而，自行車後鏈輪總成14之鏈輪之總數目不限於此實施例。 最小鏈輪SP1包括至少一個鏈輪齒SP1B。最小鏈輪SP1之至少一個鏈輪齒SP1B之總數目等於或小於10。在此實施例中，最小鏈輪SP1之至少一個鏈輪齒SP1B之總數目為10。然而，最小鏈輪SP1之至少一個鏈輪齒SP1B之總數目不限於此實施例及以上範圍。 最大鏈輪SP12包括至少一個鏈輪齒SP12B。最大鏈輪SP12之總齒數等於或大於39。最大鏈輪SP12之總齒數等於或大於45。最大鏈輪SP12之至少一個鏈輪齒SP12B之總數目等於或大於46。最大鏈輪SP12之至少一個鏈輪齒SP12B之總數目等於或大於50。在此實施例中，最大鏈輪SP12之至少一個鏈輪齒SP12B之總數目為51。然而，最大鏈輪SP12之至少一個鏈輪齒SP12B之總數目不限於此實施例及以上範圍。齒尖直徑TD1為由鏈輪齒SP12B之齒尖界定之圓的直徑。 鏈輪SP2包括至少一個鏈輪齒SP2B。鏈輪SP3包括至少一個鏈輪齒SP3B。鏈輪SP4包括至少一個鏈輪齒SP4B。鏈輪SP5包括至少一個鏈輪齒SP5B。鏈輪SP6包括至少一個鏈輪齒SP6B。鏈輪SP7包括至少一個鏈輪齒SP7B。鏈輪SP8包括至少一個鏈輪齒SP8B。鏈輪SP9包括至少一個鏈輪齒SP9B。鏈輪SP10包括至少一個鏈輪齒SP10B。鏈輪SP11包括至少一個鏈輪齒SP11B。 至少一個鏈輪齒SP2B之總數目為12。至少一個鏈輪齒SP3B之總數目為14。至少一個鏈輪齒SP4B之總數目為16。至少一個鏈輪齒SP5B之總數目為18。至少一個鏈輪齒SP6B之總數目為21。至少一個鏈輪齒SP7B之總數目為24。至少一個鏈輪齒SP8B之總數目為28。至少一個鏈輪齒SP9B之總數目為33。至少一個鏈輪齒SP10B之總數目為39。至少一個鏈輪齒SP11B之總數目為45。至少一個鏈輪具有等於或大於15之總齒數。舉例而言，鏈輪SP4之總齒數為16。鏈輪SP5之總齒數為18。鏈輪SP6之總齒數為21。鏈輪SP7之總齒數為24。鏈輪SP8之總齒數為28。鏈輪SP9之總齒數為33。鏈輪SP10之總齒數為39。鏈輪SP11之總齒數為45。鏈輪SP12之總齒數為51。鏈輪SP2至SP11中之每一者之鏈輪齒的總數目不限於此實施例。鏈輪SP1至SP12中之至少一者可包括等於或大於15之總齒數。 如圖18中所見，鏈輪SP1至SP12為彼此分開的構件。然而，鏈輪SP1至SP12中之至少一者可至少部分地與鏈輪SP1至SP12中之另一者一體地提供。自行車後鏈輪總成14進一步包含鏈輪支撐件56、複數個間隔件58、第一環59A及第二環59B。在所說明之實施例中，複數個鏈輪SP1至SP12附接至鏈輪支撐件56。舉例而言，複數個鏈輪SP1至SP12藉由黏附劑附接至鏈輪支撐件56。 如圖19中所見，鏈輪SP1包括鏈輪主體SP1A及複數個鏈輪齒SP1B。複數個鏈輪齒SP1B自鏈輪主體SP1A徑向向外延伸。鏈輪SP2包括鏈輪主體SP2A及複數個鏈輪齒SP2B。複數個鏈輪齒SP2B自鏈輪主體SP2A徑向向外延伸。鏈輪SP3包括鏈輪主體SP3A及複數個鏈輪齒SP3B。複數個鏈輪齒SP3B自鏈輪主體SP3A徑向向外延伸。鏈輪SP4包括鏈輪主體SP4A及複數個鏈輪齒SP4B。複數個鏈輪齒SP4B自鏈輪主體SP4A徑向向外延伸。鏈輪SP5包括鏈輪主體SP5A及複數個鏈輪齒SP5B。複數個鏈輪齒SP5B自鏈輪主體SP5A徑向向外延伸。第一環59A設置於鏈輪SP3與鏈輪SP4之間。第二環59B設置於鏈輪SP4與鏈輪SP5之間。 如圖20中所見，鏈輪SP6包括鏈輪主體SP6A及複數個鏈輪齒SP6B。複數個鏈輪齒SP6B自鏈輪主體SP6A徑向向外延伸。鏈輪SP7包括鏈輪主體SP7A及複數個鏈輪齒SP7B。複數個鏈輪齒SP7B自鏈輪主體SP7A徑向向外延伸。鏈輪SP8包括鏈輪主體SP8A及複數個鏈輪齒SP8B。複數個鏈輪齒SP8B自鏈輪主體SP8A徑向向外延伸。 如圖21中所見，鏈輪SP9包括鏈輪主體SP9A及複數個鏈輪齒SP9B。複數個鏈輪齒SP9B自鏈輪主體SP9A徑向向外延伸。鏈輪SP10包括鏈輪主體SP10A及複數個鏈輪齒SP10B。複數個鏈輪齒SP10B自鏈輪主體SP10A徑向向外延伸。鏈輪SP11包括鏈輪主體SP11A及複數個鏈輪齒SP11B。複數個鏈輪齒SP11B自鏈輪主體SP11A徑向向外延伸。鏈輪SP12包括鏈輪主體SP12A及複數個鏈輪齒SP12B。複數個鏈輪齒SP12B自鏈輪主體SP12A徑向向外延伸。 如圖22中所見，鏈輪支撐件56包括輪轂嚙合部分60及複數個支撐臂62。複數個支撐臂62自輪轂嚙合部分60徑向向外延伸。支撐臂62包括第一附接部分62A至第八附接部分62H。複數個間隔件58包括複數個第一間隔件58A、複數個第二間隔件58B、複數個第三間隔件58C、複數個第四間隔件58D、複數個第五間隔件58E、複數個第六間隔件58F及複數個第七間隔件58G。 如圖23中所見，第一間隔件58A設置於鏈輪SP5與鏈輪SP6之間。第二間隔件58B設置於鏈輪SP6與鏈輪SP7之間。第三間隔件58C設置於鏈輪SP7與鏈輪SP8之間。第四間隔件58D設置於鏈輪SP8與鏈輪SP9之間。第五間隔件58E設置於鏈輪SP9與鏈輪SP10之間。第六間隔件58F設置於鏈輪SP10與鏈輪SP11之間。第七間隔件58G設置於鏈輪SP11與鏈輪SP12之間。 鏈輪SP6及第一間隔件58A藉由諸如黏附劑之黏合結構附接至第一附接部分62A。鏈輪SP7及第二間隔件58B藉由諸如黏附劑之黏合結構附接至第二附接部分62B。鏈輪SP8及第三間隔件58C藉由諸如黏附劑之黏合結構附接至第三附接部分62C。鏈輪SP9及第四間隔件58D藉由諸如黏附劑之黏合結構附接至第四附接部分62D。鏈輪SP10及第五間隔件58E藉由諸如黏附劑之黏合結構附接至第五附接部分62E。鏈輪SP11及第六間隔件58F藉由諸如黏附劑之黏合結構附接至第六附接部分62F。鏈輪SP12及第七間隔件58G藉由諸如黏附劑之黏合結構附接至第七附接部分62G。鏈輪SP5及第二環59B藉由諸如黏附劑之黏合結構附接至第八附接部分62H。輪轂嚙合部分60、鏈輪SP1至SP4、第一環59A及第二環59B在軸向方向D2上固持於較大直徑部分42與鎖定構件32之突出部分32B之間。 在此實施例中，鏈輪SP1至SP12中之每一者由諸如鋁、鐵或鈦之金屬材料製成。鏈輪支撐件56、第一間隔件58A至第七間隔件58G、第一環59A及第二環59B中之每一者由諸如樹脂材料之非金屬材料製成。鏈輪支撐件56由包括樹脂材料之非金屬材料製成。然而，鏈輪SP1至SP12中之至少一者可至少部分地由非金屬材料製成。鏈輪支撐件56、第一間隔件58A至第七間隔件58G、第一環59A及第二環59B中之至少一者可至少部分地由諸如鋁、鐵或鈦之金屬材料製成。 至少一個鏈輪包括經構形以與自行車輪轂總成12嚙合之至少一個內部花鍵齒。如圖24及圖25中所見，至少一個鏈輪包括經構形以與自行車輪轂總成12嚙合之至少十個內部花鍵齒。至少一個內部花鍵齒包括複數個內部花鍵齒。因此，至少一個鏈輪包括經構形以與自行車輪轂總成12嚙合之複數個內部花鍵齒。在此實施例中，鏈輪SP1包括經構形以與自行車輪轂總成12嚙合之至少十個內部花鍵齒64。在此實施例中，鏈輪SP1包括經構形以與自行車輪轂總成12之鏈輪支撐主體28之外部花鍵齒40嚙合的內部花鍵齒64。鏈輪主體SP1A具有環狀形狀。內部花鍵齒64自鏈輪主體SP1A徑向向內延伸。 如圖26中所見，至少十個內部花鍵齒64之總數目等於或大於20。至少十個內部花鍵齒64之總數目等於或大於25。在此實施例中，內部花鍵齒64之總數目為26。然而，內部花鍵齒64之總數目不限於此實施例及以上範圍。 至少十個內部花鍵齒64具有第一內部周節角PA21及第二內部周節角PA22。複數個內部花鍵齒64中之至少兩個內部花鍵齒相對於自行車後鏈輪總成14之旋轉中心軸線A1以第一內部周節角PA21沿圓周配置。複數個內部花鍵齒64中之至少兩個內部花鍵齒相對於旋轉中心軸線A1以第二內部周節角PA22沿圓周配置。在此實施例中，第二內部周節角PA22不同於第一內部周節角PA21。然而，第二內部周節角PA22可實質上等於第一內部周節角PA21。 在此實施例中，內部花鍵齒64係在圓周方向D1上以第一內部周節角PA21沿圓周配置。內部花鍵齒64中之兩個內部花鍵齒係在圓周方向D1上以第二內部周節角PA22配置。然而，內部花鍵齒64中之至少兩個內部花鍵齒可在圓周方向D1上以另一內部周節角配置。 第一內部周節角PA21在10度至20度之範圍內。第一內部周節角PA21在12度至15度之範圍內。第一內部周節角PA21在13度至14度之範圍內。在此實施例中，第一內部周節角PA21為13.3度。然而，第一內部周節角PA21不限於此實施例及以上範圍。 第二內部周節角PA22在5度至30度之範圍內。在此實施例中，第二內部周節角PA22為26度。然而，第二內部周節角PA22不限於此實施例及以上範圍。 至少十個內部花鍵齒64中之至少一者具有不同於至少十個內部花鍵齒64中之另一者之第二花鍵形狀的第一花鍵形狀。至少十個內部花鍵齒64中之至少一者具有不同於至少十個內部花鍵齒64中之另一者之第二花鍵大小的第一花鍵大小。至少十個內部花鍵齒64中之至少一者具有不同於至少十個內部花鍵齒64中之另一者之橫截面形狀的橫截面形狀。然而，如圖27中所見，內部花鍵齒64可具有彼此相同的形狀。內部花鍵齒64可具有彼此相同的大小。內部花鍵齒64可具有彼此相同的橫截面形狀。 如圖28中所見，至少一個內部花鍵齒64包含內部花鍵傳動表面66及內部花鍵非傳動表面68。至少一個內部花鍵齒64包括複數個內部花鍵齒64。複數個內部花鍵齒64包括用以在踩踏期間接收來自自行車輪轂總成12 (圖6)之傳動旋轉力F1的複數個內部花鍵傳動表面66。複數個內部花鍵齒64包括複數個內部花鍵非傳動表面68。內部花鍵傳動表面66可與鏈輪支撐主體28接觸以在踩踏期間將傳動旋轉力F1自鏈輪SP1傳輸至鏈輪支撐主體28。內部花鍵傳動表面66面向傳動旋轉方向D11。內部花鍵非傳動表面68在圓周方向D1上設置於內部花鍵傳動表面66之反向側上。內部花鍵非傳動表面68面向反向旋轉方向D12，從而在踩踏期間不將傳動旋轉力F1自鏈輪SP1傳輸至鏈輪支撐主體28。 至少十個內部花鍵齒64分別具有圓周最大寬度MW2。內部花鍵齒64分別具有圓周最大寬度MW2。圓周最大寬度MW2定義為接收施加至內部花鍵齒64之推力F3的最大寬度。圓周最大寬度MW2定義為基於內部花鍵傳動表面66之直線距離。 內部花鍵傳動表面66包括徑向最外邊緣66A及徑向最內邊緣66B。內部花鍵傳動表面66自徑向最外邊緣66A延伸至徑向最內邊緣66B。第二參考圓RC21界定於徑向最外邊緣66A上且以旋轉中心軸線A1為中心。第二參考圓RC21與內部花鍵非傳動表面68在參考點68R處相交。圓周最大寬度MW2在圓周方向D1上自徑向最內邊緣66B直線延伸至參考點68R。 內部花鍵非傳動表面68包括徑向最外邊緣68A及徑向最內邊緣68B。內部花鍵非傳動表面68自徑向最外邊緣68A延伸至徑向最內邊緣68B。參考點68R設置於徑向最外邊緣68A與徑向最內邊緣68B之間。 圓周最大寬度MW2之總和等於或大於40 mm。圓周最大寬度MW2之總和等於或大於45 mm。圓周最大寬度MW2之總和等於或大於50 mm。在此實施例中，圓周最大寬度MW2之總和為50.8 mm。然而，圓周最大寬度MW2之總和不限於此實施例。 如圖29中所見，至少一個內部花鍵齒64具有內部花鍵頂徑DM21。至少一個內部花鍵齒64具有內部花鍵齒根圓RC22，內部花鍵齒根圓RC22具有內部花鍵頂徑DM21。然而，內部花鍵齒根圓RC22可具有不同於內部花鍵頂徑DM21之另一直徑。內部花鍵頂徑DM21等於或小於30 mm。內部花鍵頂徑DM21等於或大於25 mm。內部花鍵頂徑DM21等於或大於29 mm。在此實施例中，內部花鍵頂徑DM21為29.6 mm。然而，內部花鍵頂徑DM21不限於此實施例及以上範圍。在此實施例中，內部花鍵頂徑DM21對齒尖直徑TD1之比率在0.1至0.2之範圍內。最大鏈輪SP12之齒尖直徑TD1 (圖1)在183.7 mm至207.9 mm之範圍內。內部花鍵頂徑DM21對齒尖直徑TD1之比率在0.14至0.17之範圍內。然而，內部花鍵頂徑DM21對齒尖直徑TD1之比率不限於以上範圍。 至少一個內部花鍵齒64具有等於或小於28 mm之內部花鍵底徑DM22。內部花鍵底徑DM22等於或大於25 mm。內部花鍵底徑DM22等於或大於27 mm。在此實施例中，內部花鍵底徑DM22為27.7 mm。然而，內部花鍵底徑DM22不限於此實施例及以上範圍。 如圖28中所見，複數個內部花鍵傳動表面66包括徑向最外邊緣66A及徑向最內邊緣66B。複數個內部花鍵傳動表面66各自包括自徑向最外邊緣66A至徑向最內邊緣66B界定之徑向長度RL21。複數個內部花鍵傳動表面66之徑向長度RL21之總和等於或大於7 mm。徑向長度RL21之總和等於或大於10 mm。徑向長度RL21之總和等於或大於15 mm。在此實施例中，徑向長度RL21之總和為19.5 mm。然而，徑向長度RL21之總和不限於此實施例及以上範圍。 複數個內部花鍵齒64具有額外徑向長度RL22。額外徑向長度RL22分別自內部花鍵齒根圓RC22至複數個內部花鍵齒64之徑向最內端64A界定。額外徑向長度RL22之總和等於或大於12 mm。在此實施例中，額外徑向長度RL22之總和為27.95 mm。然而，額外徑向長度RL22之總和不限於此實施例及以上範圍。 內部花鍵齒64中之至少一者相對於圓周齒尖中心線CL2具有不對稱形狀。圓周齒尖中心線CL2為連接旋轉中心軸線A1及內部花鍵齒64之徑向最內端64A之圓周中心點CP2的線。然而，內部花鍵齒64中之至少一者可相對於圓周齒尖中心線CL2具有對稱形狀。內部花鍵齒64中之至少一者包含內部花鍵傳動表面66及內部花鍵非傳動表面68。 內部花鍵傳動表面66具有第一內部花鍵表面角AG21。第一內部花鍵表面角AG21界定於內部花鍵傳動表面66與第一徑向線L21之間。第一徑向線L21自自行車後鏈輪總成14之旋轉中心軸線A1延伸至內部花鍵傳動表面66之徑向最外邊緣66A。第一內部周節角PA21或第二內部周節角PA22界定於相鄰第一徑向線L21 (參見例如圖26)之間。 內部花鍵非傳動表面68具有第二內部花鍵表面角AG22。第二內部花鍵表面角AG22界定於內部花鍵非傳動表面68與第二徑向線L22之間。第二徑向線L22自自行車後鏈輪總成14之旋轉中心軸線A1延伸至內部花鍵非傳動表面68之徑向最外邊緣68A。 在此實施例中，第二內部花鍵表面角AG22不同於第一內部花鍵表面角AG21。第一內部花鍵表面角AG21小於第二內部花鍵表面角AG22。然而第一內部花鍵表面角AG21可等於或大於第二內部花鍵表面角AG22。 第一內部花鍵表面角AG21在0度至10度之範圍內。第二內部花鍵表面角AG22在0度至60度之範圍內。在此實施例中，第一內部花鍵表面角AG21為5度。第二內部花鍵表面角AG22為45度。然而，第一內部花鍵表面角AG21及第二內部花鍵表面角AG22不限於此實施例及以上範圍。 如圖30中所見，內部花鍵齒64與外部花鍵齒40嚙合以將傳動旋轉力F1自鏈輪SP1傳輸至鏈輪支撐主體28。內部花鍵傳動表面66可與外部花鍵傳動表面48接觸以將傳動旋轉力F1自鏈輪SP1傳輸至鏈輪支撐主體28。在內部花鍵傳動表面66與外部花鍵傳動表面48接觸之狀態中，內部花鍵非傳動表面68與外部花鍵非傳動表面50間隔開。 如圖31中所見，鏈輪SP2包括複數個內部花鍵齒70。鏈輪SP3包括複數個內部花鍵齒72。鏈輪SP4包括複數個內部花鍵齒74。第一環59A包括複數個內部花鍵齒76。如圖32中所見，鏈輪支撐件56之輪轂嚙合部分60包括複數個內部花鍵齒78。複數個內部花鍵齒70具有與複數個內部花鍵齒64之結構實質上相同的結構。複數個內部花鍵齒72具有與複數個內部花鍵齒64之結構實質上相同的結構。複數個內部花鍵齒74具有與複數個內部花鍵齒64之結構實質上相同的結構。複數個內部花鍵齒76具有與複數個內部花鍵齒64之結構實質上相同的結構。複數個內部花鍵齒78具有與複數個內部花鍵齒64之結構實質上相同的結構。因此，出於簡潔起見，此處將不作詳細描述。 如圖6中所見，自行車後鏈輪總成14進一步包含後輪轂鄰接表面80。後輪轂鄰接表面80經構形以在自行車後鏈輪總成14安裝至自行車輪轂總成12之狀態中在相對於自行車後鏈輪總成14之旋轉中心軸線A1的軸向方向D2上鄰接自行車輪轂總成12。在此實施例中，後輪轂鄰接表面80在軸向方向D2上鄰接鏈輪支撐主體28之較大直徑部分42。後輪轂鄰接表面80設置於鏈輪支撐件56之輪轂嚙合部分60上。然而，後輪轂鄰接表面80之位置不限於此實施例。 最大鏈輪SP12具有軸向內表面SP12C及在相對於自行車後鏈輪總成14之旋轉中心軸線A1的軸向方向D2上設置於軸向內表面SP12C之反向側上的軸向外表面SP12D。相比於軸向內表面SP12C，軸向外表面SP12D在軸向方向D2上更接近後輪轂鄰接表面80。 如圖15中所見，自行車輪轂總成12具有在軸向方向D2上將自行車輪轂總成12二等分之軸向中心平面CPL。自行車輪轂總成12之軸向中心平面CPL垂直於旋轉中心軸線A1。如圖6中所見，在自行車後鏈輪總成14安裝至自行車後輪轂總成12之狀態下，相比於後輪轂鄰接表面80，軸向內表面SP12C經定位成更接近自行車後輪轂總成12之軸向中心平面CPL。在軸向方向D2上界定於軸向內表面SP12C與後輪轂鄰接表面80之間的軸向距離AD1等於或大於7 mm。軸向距離AD1等於或大於10 mm。然而，軸向距離AD1不限於以上範圍。 如圖9及圖10中所見，鏈輪支撐主體28包括設置於基座支撐件41之軸向端處的輪轂指示器28I。當沿旋轉中心軸線A1檢視時，輪轂指示符28I設置於第二外部周節角PA12之區域中。在此實施例中，輪轂指示器28I包括點。然而，輪轂指示器28I可包括其他形狀，諸如三角形及線。此外，輪轂指示器28I可為例如藉由諸如黏附劑之黏合結構附接至鏈輪支撐主體28的單獨構件。輪轂指示器28I之位置不限於此實施例。 如圖26及圖27中所見，鏈輪SP1包括設置於鏈輪主體SP1A之軸向端處的鏈輪指示器SP1I。當沿旋轉中心軸線A1檢視時，鏈輪指示器SP1I設置於第二內部周節角PA22之區域中。在此實施例中，鏈輪指示器SP1I包括點。然而，鏈輪指示器SP1I可包括其他形狀，諸如三角形及線。此外，鏈輪指示器SP1I可為例如藉由諸如黏附劑之黏合結構附接至鏈輪SP1的單獨構件。鏈輪指示器SP1I之位置不限於此實施例。鏈輪指示器SP1I可提供至其他鏈輪SP2至SP12中之任一者。鏈輪指示器SP1I亦可提供至鏈輪支撐件56。 修改 圖33說明根據自行車後鏈輪總成14之修改的自行車後鏈輪總成214。如圖33中所見，自行車後鏈輪總成214包含鏈輪SP1及複數個鏈輪SP202至SP212。鏈輪SP202至SP212具有與鏈輪SP2至SP12之結構實質上相同的結構。如圖33及圖34中所見，舉例而言，鏈輪SP212包括鏈輪主體SP12A及複數個鏈輪齒SP12B。 鏈輪SP202至SP212中之一者亦可被稱作第一鏈輪。鄰近於第一鏈輪之另一鏈輪亦可被稱作第二鏈輪。亦即，自行車後鏈輪總成214之至少一個鏈輪包括第一鏈輪及第二鏈輪。第一鏈輪具有第一總齒數。第二鏈輪具有小於第一總齒數之第二總齒數。第二鏈輪在軸向方向D2上鄰近於第一鏈輪，且第一鏈輪與第二鏈輪之間無另一鏈輪。 如圖33中所見，舉例而言，第一鏈輪SP212具有為51之第一總齒數。第二鏈輪SP211具有為45之第二總齒數。鏈輪SP212及SP211亦可被稱作第一鏈輪SP212及第二鏈輪SP211。鏈輪SP211及SP210亦可被稱作第一鏈輪SP211及第二鏈輪SP210。鏈輪SP210及SP209亦可被稱作第一鏈輪SP210及第二鏈輪SP209。鏈輪SP209及SP208亦可被稱作第一鏈輪SP209及第二鏈輪SP208。鏈輪SP208及SP207亦可被稱作第一鏈輪SP208及第二鏈輪SP207。鏈輪SP207及SP206亦可被稱作第一鏈輪SP207及第二鏈輪SP206。鏈輪SP206及SP205亦可被稱作第一鏈輪SP206及第二鏈輪SP205。鏈輪SP205及SP204亦可被稱作第一鏈輪SP205及第二鏈輪SP204。鏈輪SP204及SP203亦可被稱作第一鏈輪SP204及第二鏈輪SP203。鏈輪SP203及SP202亦可被稱作第一鏈輪SP203及第二鏈輪SP202。鏈輪SP202及SP1亦可被稱作第一鏈輪SP202及第二鏈輪SP1。 如圖34中所見，舉例而言，第一鏈輪SP212包括至少一個第一移位促進區域SP212X以促進自行車鏈20自第二鏈輪SP211移位至第一鏈輪SP212之第一移位操作。第一鏈輪SP212包括至少一個第二移位促進區域SP212Y以促進自行車鏈20自第一鏈輪SP212移位至第二鏈輪SP211之第二移位操作。在此實施例中，第一鏈輪SP212包括複數個第一移位促進區域SP212X以促進自行車鏈20自第二鏈輪SP211移位至第一鏈輪SP212之第一移位操作。第一鏈輪SP212包括複數個第二移位促進區域SP212Y以促進自行車鏈20自第一鏈輪SP212移位該第二鏈輪SP211之第二移位操作。 第一鏈輪SP212包括複數個第一移位促進凹槽SP212X1及複數個第二移位促進凹槽SP212Y1。第一移位促進凹槽SP212X1設置於第一移位促進區域SP212X中。第二移位促進凹槽SP212Y1設置於第二移位促進區域SP212Y中。 如圖35中所見，第一移位促進凹槽SP212X1設置於軸向外表面SP12D上以減少第一移位操作中第一鏈輪SP212與自行車鏈20 (圖33)之間的干擾。第二移位促進凹槽SP212Y1設置於軸向外表面SP12D上以減少第二移位操作中第一鏈輪SP212與自行車鏈20 (圖33)之間的干擾。第二移位促進凹槽SP212Y1在圓周方向D1上與第一移位促進凹槽SP212X1間隔開。 如圖36中所見，第一鏈輪SP212之複數個鏈輪齒SP12B包括複數個移位促進齒SP212B1至SP212B3。移位促進齒SP212B1至SP212B3設置於第二移位促進區域SP212Y中。如圖34中所見，第二移位促進區域SP212Y在圓周方向D1上由第二移位促進凹槽SP212Y1及移位促進齒SP212B3界定。 如圖37中所見，移位促進齒SP212B1包括促進凹槽SP212R1。移位促進齒SP212B2包括促進凹槽SP212R2。移位促進齒SP212B3包括促進凹槽SP212R3。促進凹槽SP212R1設置於軸向內表面SP12C上以促進在第二移位操作中使自行車鏈20與第一鏈輪SP212脫軌。促進凹槽SP212R2設置於軸向內表面SP12C上以促進在第二移位操作中使自行車鏈20與第一鏈輪SP212脫軌。促進凹槽SP212R3設置於軸向內表面SP12C上以促進在第二移位操作中使自行車鏈20與第一鏈輪SP212脫軌。 鏈輪SP202至SP211中之每一者的第一移位促進區域及第二移位促進區域分別具有與第一鏈輪SP212之第一移位促進區域SP212X及第二移位促進區域SP212Y之結構實質上相同的結構。出於簡潔起見，此處將不對其進行詳細描述。如本文中所使用，術語「移位促進區域」意欲為經有意設計以促進自行車鏈在區域中自一鏈輪至另一軸向鄰近鏈輪之移位操作的區域。 如圖38中所見，在上述實施例中，外部花鍵齒40可包括在圓周方向D1上設置於外部花鍵傳動表面48與外部花鍵非傳動表面50之間的溝槽40G。溝槽40G減少自行車輪轂總成12之重量。 如圖39中所見，在上述實施例中，內部花鍵齒64可包括在圓周方向D1上設置於內部花鍵傳動表面66與內部花鍵非傳動表面68之間的溝槽64G。溝槽64G減少自行車後鏈輪總成14之重量。 如本文中所使用之術語「包含」及其派生詞意欲為指定所陳述特徵、元件、組件、群組、整數及/或步驟之存在但不排除其他未陳述特徵、元件、組件、群組、整數及/或步驟之存在的開放術語。此概念亦適用於類似含義之詞語，例如術語「具有」、「包括」及其派生詞。 術語「構件」、「區段」、「部分」、「部件」、「元件」、「主體」及「結構」當以單數形式使用時可具有單一部件或複數個部件之雙重含義。 諸如本申請案中敍述的「第一」及「第二」之序數數目僅為標識符，而不具有任何其他含義，例如特定次序及類似者。此外，例如，術語「第一元件」自身不暗示「第二元件」之存在，且術語「第二元件」自身不暗示「第一元件」之存在。 如本文中所使用之術語「對」可涵蓋除其中成對元件具有彼此相同的形狀或結構之構形外之其中成對元件具有彼此不同的形狀或結構之構形。 因此，術語「一」、「一或多個」及「至少一個」在本文中可互換地使用。 最後，如本文中所使用之諸如「實質上」、「大約」及「大致」之程度術語意謂所修飾之術語之合理量之偏差以使得最終結果並無顯著改變。本申請案中所描述之所有數值可被理解為包括諸如「實質上」、「大約」及「大致」之術語。 顯然，鑒於以上教示，本發明之眾多修改及變化係可能的。因此應理解，在所附申請專利範圍之範疇內，可以不同於如本文中特定描述之方式的其他方式實踐本發明。This application is a partial continuation application of U.S. Patent Application No. 15/608,924 filed on May 30, 2017. The content of this application is incorporated herein by reference in its entirety. The embodiments will now be described with reference to the drawings, in which like reference numerals designate corresponding or identical elements in the various drawings. Referring first to FIG. 1, a bicycle transmission system 10 according to an embodiment includes a bicycle hub assembly 12 and a bicycle rear sprocket assembly 14. The bicycle hub assembly 12 is fastened to the bicycle frame BF. The bicycle rear sprocket assembly 14 is mounted on the bicycle hub assembly 12. The bicycle brake rotor 16 is mounted on the bicycle hub assembly 12. The bicycle transmission system 10 further includes a crank assembly 18 and a bicycle chain 20. The crank assembly 18 includes a crank shaft 22, a right crank arm 24, a left crank arm 26 and a front sprocket 27. The right crank arm 24 and the left crank arm 26 are fastened to the crank shaft 22. The front sprocket 27 is fastened to at least one of the crankshaft 22 and the right crank arm 24. The bicycle chain 20 meshes with the front sprocket 27 and the bicycle rear sprocket assembly 14 to transmit the pedaling force from the front sprocket 27 to the bicycle rear sprocket assembly 14. The crank assembly 18 includes a front sprocket 27 as the single sprocket in the illustrated embodiment. However, the crank assembly 18 may include a plurality of front sprockets. The bicycle rear sprocket assembly 14 is a rear sprocket assembly. However, the structure of the bicycle rear sprocket assembly 14 can be applied to the front sprocket. In this application, the following directional terms "front", "back", "forward", "backward", "left", "right", "horizontal", "up" and "down" and any other Similar directional terms refer to the directions determined based on the users (e.g., riders) sitting on the seat (not shown) of the bicycle and facing the handlebars (not shown). Therefore, when these terms are used to describe the bicycle transmission system 10, the bicycle hub assembly 12, or the bicycle rear sprocket assembly 14, they should refer to the bicycle transmission system 10 as used in the upright riding position on a horizontal surface. Interpretation of bicycles with bicycle hub assembly 12 or bicycle rear sprocket assembly 14. As seen in FIGS. 2 and 3, the bicycle hub assembly 12 and the bicycle rear sprocket assembly 14 have a rotation center axis A1. The bicycle rear sprocket assembly 14 is rotatably supported by the bicycle hub assembly 12 about the rotation center axis A1 relative to the bicycle frame BF (FIG. 1 ). The bicycle rear sprocket assembly 14 is configured to mesh with the bicycle chain 20 so as to transmit the driving rotational force F1 between the bicycle chain 20 and the bicycle rear sprocket assembly 14 during pedaling. During pedaling, the bicycle rear sprocket assembly 14 rotates around the rotation center axis A1 in the transmission rotation direction D11. The driving rotation direction D11 is defined along the circumferential direction D1 of the bicycle hub assembly 12 or the bicycle rear sprocket assembly 14. The reverse rotation direction D12 is the opposite direction of the transmission rotation direction D11, and is defined along the circumferential direction D1. As seen in FIG. 2, the bicycle hub assembly 12 includes a sprocket support body 28. The bicycle rear sprocket assembly 14 is mounted on the sprocket support body 28 to transmit the transmission rotational force F1 between the sprocket support body 28 and the bicycle rear sprocket assembly 14. The bicycle hub assembly 12 further includes a hub axle 30. The sprocket support body 28 is rotatably mounted on the hub axle 30 around the rotation center axis A1. The bicycle rear sprocket assembly 14 further includes a locking member 32. The locking member 32 is fastened to the sprocket support body 28 to hold the bicycle rear sprocket assembly 14 relative to the sprocket support body 28 in an axial direction D2 parallel to the rotation center axis A1. As seen in FIG. 4, the bicycle hub assembly 12 is fastened to the bicycle frame BF by the wheel fastening structure WS. The hub axle 30 has a through hole 30A. The fastening rod WS1 of the wheel fastening structure WS extends through the through hole 30A of the hub axle 30. The hub axle 30 includes a first shaft end 30B and a second shaft end 30C. The hub shaft 30 extends between the first shaft end 30B and the second shaft end 30C along the rotation center axis A1. The first shaft end 30B is disposed in the first groove BF11 of the first frame BF1 of the bicycle frame BF. The second shaft end 30C is disposed in the second groove BF21 of the second frame BF2 of the bicycle frame BF. The hub axle 30 is held between the first frame BF1 and the second frame BF2 by the wheel fastening structure WS. The wheel fastening structure WS includes a structure known in the applied bicycle. Therefore, for the sake of brevity, a detailed description will not be given here. As seen in FIGS. 4 and 5, the bicycle hub assembly 12 further includes a brake rotor support body 34. The brake rotor support body 34 is rotatably mounted on the hub axle 30 around the rotation center axis A1. The brake rotor support body 34 is coupled to the bicycle brake rotor 16 (FIG. 1) to transmit the braking rotation force from the bicycle brake rotor 16 to the brake rotor support body 34. As seen in FIG. 5, the bicycle hub assembly 12 further includes a hub body 36. The hub main body 36 is rotatably mounted on the hub axle 30 around the rotation center axis A1. In this embodiment, the sprocket support body 28 is a separate member from the hub body 36. The brake rotor support body 34 and the hub body 36 are integrally provided as a one-piece unitary member. However, the sprocket support body 28 may be provided integrally with the hub body 36. The brake rotor support body 34 may be a separate member from the hub body 36. The hub body 36 includes a first flange 36A and a second flange 36B. The first spoke (not shown) is coupled to the first flange 36A. The second spoke (not shown) is coupled to the second flange 36B. The second flange 36B is spaced apart from the first flange 36A in the axial direction D2. The first flange 36A is provided between the sprocket support body 28 and the second flange 36B in the axial direction D2. The second flange 36B is provided between the first flange 36A and the brake rotor support body 34 in the axial direction D2. The locking member 32 includes an outer threaded portion 32A. The sprocket support body 28 includes an inner threaded portion 28A. In a state where the locking member 32 is fastened to the sprocket support body 28, the outer threaded portion 32A is threadedly engaged with the inner threaded portion 28A. As seen in FIG. 6, the locking member 32 is configured to prevent at least one sprocket mounted on the bicycle hub assembly 12 from moving axially relative to the rotation center axis A1 of the bicycle rear sprocket assembly 14. As seen in FIG. 5, the locking member 32 includes a tubular body portion 32C and a protruding portion 32B. The tubular body portion 32C has a center axis A2. The protruding portion 32B extends radially outward from the tubular body portion 32C with respect to the central axis A2 of the tubular body portion 32C. The tubular body portion 32C has an outer threaded portion 32A that is configured to engage with the inner threaded portion 28A of the bicycle hub assembly 12. As seen in Figure 6, the protruding portion 32B is configured to abut at least one sprocket. In this embodiment, the protruding portion 32B is configured to abut the sprocket SP1. The tubular body portion 32C has a first outer diameter ED1 equal to or smaller than 26 mm. The first outer diameter ED1 is equal to or greater than 25 mm. In this embodiment, the first outer diameter ED1 is 25.45 mm. However, the first outer diameter ED1 is not limited to this embodiment and the above range. The protruding portion 32B has a second outer diameter ED2 equal to or smaller than 32 mm. The second outer diameter ED2 is equal to or greater than 30 mm. In this embodiment, the second outer diameter ED2 is 31.5 mm. However, the second outer diameter ED2 is not limited to this embodiment and the above range. As seen in FIG. 5, the locking member 32 has a tool engaging portion 32D. The tool engaging portion 32D is provided on the inner peripheral surface 32C1 of the tubular body portion 32C to engage with the tool. The tool engaging portion 32D includes a plurality of tool engaging grooves 32D1 provided on the inner peripheral surface 32C1 of the tubular body portion 32C. However, the structure of the tool engaging portion 32D is not limited to this embodiment. In the illustrated embodiment, the tool engaging portion 32D may be omitted from the locking member 32, or may have another shape different from the tool engaging portion 32D. As seen in FIG. 6, the bicycle hub assembly 12 further includes a ratchet structure 38. The sprocket support body 28 is operatively coupled to the hub body 36 by the ratchet structure 38. The ratchet structure 38 is configured to couple the sprocket support body 28 to the hub body 36 so as to rotate the sprocket support body 28 together with the hub body 36 in the drive rotation direction D11 (FIG. 5) during pedaling. The ratchet structure 38 is configured to allow the sprocket support body 28 to rotate relative to the hub body 36 in the reverse rotation direction D12 (FIG. 5) during idling. Therefore, the ratchet structure 38 can be interpreted as a one-way coupling structure 38. The ratchet structure 38 includes a structure known in the bicycle field. Therefore, for the sake of brevity, a detailed description will not be given here. The bicycle hub assembly 12 includes a first bearing 39A and a second bearing 39B. The first bearing 39A and the second bearing 39B are provided between the sprocket support body 28 and the hub axle 30 to rotatably support the sprocket support body 28 relative to the hub axle 30 about the rotation center axis A1. In this embodiment, each of the sprocket support body 28, the brake rotor support body 34, and the hub body 36 is made of a metal material such as aluminum, iron, or titanium. However, at least one of the sprocket support body 28, the brake rotor support body 34, and the hub body 36 may be made of a non-metallic material. As seen in Figures 7 and 8, the sprocket support body 28 includes at least one external spline tooth 40 that is configured to mesh with the bicycle rear sprocket assembly 14 (Figure 6). The sprocket support body 28 includes a plurality of external spline teeth 40 that are configured to mesh with the bicycle rear sprocket assembly 14 (FIG. 6). That is, at least one external spline tooth 40 includes a plurality of external spline teeth 40. The sprocket support body 28 includes at least nine external spline teeth 40 that are configured to mesh with the bicycle rear sprocket assembly 14 (FIG. 6). The sprocket support body 28 includes at least ten external spline teeth 40 that are configured to mesh with the bicycle rear sprocket assembly 14 (FIG. 6). The sprocket supporting body 28 includes a base support 41 having a tubular shape. The base support 41 extends along the rotation center axis A1. The outer spline teeth 40 extend radially outward from the base support 41. The sprocket supporting body 28 includes a larger diameter portion 42, a flange 44 and a plurality of spiral external spline teeth 46. The larger diameter portion 42 and the flange 44 extend radially outward from the base support 41. The larger diameter portion 42 is provided between the plurality of external spline teeth 40 and the flange 44 in the axial direction D2. The larger diameter portion 42 and the flange 44 are provided between the plurality of external spline teeth 40 and the plurality of spiral external spline teeth 46 in the axial direction D2. As seen in FIG. 6, the bicycle rear sprocket assembly 14 is held between the larger diameter portion 42 and the protruding portion 32B of the locking member 32 in the axial direction D2. The larger diameter portion 42 may have an internal cavity, so that a transmission structure such as a one-way coupling structure can be accommodated in the internal cavity. If necessary, the larger diameter portion 42 can be omitted from the bicycle hub assembly 12. As seen in FIG. 9, the total number of at least ten external spline teeth 40 is equal to or greater than 20. The total number of at least ten external spline teeth 40 is equal to or greater than 25. In this embodiment, the total number of at least ten external spline teeth 40 is 26. However, the total number of external spline teeth 40 is not limited to this embodiment and the above range. At least ten outer spline teeth 40 have a first outer peripheral pitch angle PA11 and a second outer peripheral pitch angle PA12. At least two of the plurality of outer spline teeth 40 are circumferentially arranged with respect to the rotation center axis A1 of the bicycle hub assembly 12 at a first outer peripheral pitch angle PA11. At least two of the plurality of outer spline teeth 40 are circumferentially arranged with respect to the rotation center axis A1 of the bicycle hub assembly 12 at a second outer peripheral pitch angle PA12. In this embodiment, the second outer peripheral pitch angle PA12 is different from the first outer peripheral pitch angle PA11. However, the second outer circumferential pitch angle PA12 may be substantially equal to the first outer circumferential pitch angle PA11. In this embodiment, the outer spline teeth 40 are arranged at the first outer peripheral pitch angle PA11 in the circumferential direction D1. Two of the outer spline teeth 40 are arranged at the second outer peripheral pitch angle PA12 in the circumferential direction D1. However, at least two of the outer spline teeth 40 may be arranged at another outer pitch angle in the circumferential direction D1. The first outer circumferential pitch angle PA11 is in the range of 10 degrees to 20 degrees. The first outer circumferential pitch angle PA11 is in the range of 12 degrees to 15 degrees. The first outer pitch angle PA11 is in the range of 13 degrees to 14 degrees. In this embodiment, the first outer peripheral pitch angle PA11 is 13.3 degrees. However, the first outer circumferential pitch angle PA11 is not limited to this embodiment and the above range. The second circumferential pitch angle PA12 is in the range of 5 degrees to 30 degrees. In this embodiment, the second outer peripheral pitch angle PA12 is 26 degrees. However, the second outer circumferential pitch angle PA12 is not limited to this embodiment and the above range. The outer spline teeth 40 have substantially the same shape as each other. The outer spline teeth 40 have spline sizes that are substantially the same as each other. When viewed along the rotation center axis A1, the outer spline teeth 40 have substantially the same profile as each other. However, as seen in FIG. 10, at least one of the at least ten external spline teeth 40 may have a first spline shape that is different from the second spline shape of another of the at least ten external spline teeth 40 . At least one of the at least ten external spline teeth 40 may have a first spline size that is different from the second spline size of another one of the at least ten external spline teeth 40. When viewed along the rotation center axis A1, at least one of the at least ten external spline teeth 40 may have a profile different from that of another of the at least ten external spline teeth 40. In FIG. 10, one of the outer spline teeth 40 has a spline shape different from the spline shape of the other teeth in the outer spline teeth 40. One of the outer spline teeth 40 has a spline size that is different from the spline size of the other teeth in the outer spline teeth 40. When viewed along the rotation center axis A1, one of the outer spline teeth 40 has a profile that is different from the profile of the other teeth in the outer spline teeth 40. As seen in FIG. 11, each of the at least ten outer spline teeth 40 has an outer spline transmission surface 48 and an outer spline non-transmission surface 50. The plurality of external spline teeth 40 includes a plurality of external spline transmission surfaces 48 for receiving the transmission rotational force F1 from the bicycle rear sprocket assembly 14 (FIG. 6) during pedaling. The plurality of external spline teeth 40 includes a plurality of external spline non-transmission surfaces 50. The outer spline transmission surface 48 may be in contact with the bicycle rear sprocket assembly 14 to receive the transmission rotational force F1 from the bicycle rear sprocket assembly 14 (FIG. 6) during pedaling. The outer spline transmission surface 48 faces the reverse rotation direction D12. The outer spline non-transmission surface 50 is provided on the opposite side of the outer spline transmission surface 48 in the circumferential direction D1. The outer spline non-transmission surface 50 faces the transmission rotation direction D11 so as not to receive the transmission rotation force F1 from the bicycle rear sprocket assembly 14 during pedaling. At least ten external spline teeth 40 each have a maximum circumferential width MW1. The outer spline teeth 40 each have a maximum circumferential width MW1. The maximum circumferential width MW1 is defined as the maximum width for receiving the thrust F2 applied to the external spline teeth 40. The maximum circumferential width MW1 is defined as the linear distance based on the external spline transmission surface 48. Each of the plurality of outer spline transmission surfaces 48 includes a radially outermost edge 48A and a radially innermost edge 48B. The outer spline transmission surface 48 extends from the radially outermost edge 48A to the radially innermost edge 48B. The first reference circle RC11 is defined on the radially innermost edge 48B and is centered on the rotation center axis A1. The first reference circle RC11 intersects the outer spline non-transmission surface 50 at a reference point 50R. The maximum circumferential width MW1 extends linearly from the radially innermost edge 48B to the reference point 50R in the circumferential direction D1. Each of the plurality of outer spline non-transmission surfaces 50 includes a radially outermost edge 50A and a radially innermost edge 50B. The outer spline non-transmission surface 50 extends from the radially outermost edge 50A to the radially innermost edge 50B. The reference point 50R is provided between the radially outermost edge 50A and the radially innermost edge 50B. However, the reference point 50R may coincide with the radially innermost edge 50B. The sum of the maximum circumference MW1 is equal to or greater than 55 mm. The sum of the maximum width MW1 of the circumference is equal to or greater than 60 mm. The sum of the maximum circumference MW1 is equal to or greater than 65 mm. In this embodiment, the sum of the maximum circumferential width MW1 is 68 mm. However, the sum of the maximum circumferential width MW1 is not limited to this embodiment and the above range. As seen in Fig. 12, at least one outer spline tooth 40 has an outer spline tip diameter DM11. The top diameter of the external spline DM11 is equal to or greater than 25 mm. The top diameter of the external spline DM11 is equal to or greater than 29 mm. The top diameter of the external spline DM11 is equal to or less than 30 mm. In this embodiment, the top diameter DM11 of the external spline is 29.6 mm. However, the outer spline top diameter DM11 is not limited to this embodiment and the above range. At least one outer spline tooth 40 has an outer spline bottom diameter DM12. At least one outer spline tooth 40 has an outer spline tooth root circle RC12, and the outer spline tooth root circle RC12 has an outer spline bottom diameter DM12. However, the outer spline root circle RC12 may have another diameter different from the outer spline bottom diameter DM12. The bottom diameter of the outer spline DM12 is equal to or less than 28 mm. The bottom diameter of the outer spline DM12 is equal to or greater than 25 mm. The bottom diameter of the outer spline DM12 is equal to or greater than 27 mm. In this embodiment, the bottom diameter DM12 of the outer spline is 27.2 mm. However, the outer spline bottom diameter DM12 is not limited to this embodiment and the above range. The larger diameter portion 42 has an outer diameter DM13 larger than the top diameter DM11 of the outer spline. The outer diameter DM13 is in the range of 32 mm to 40 mm. In this embodiment, the outer diameter DM13 is 35 mm. However, the outer diameter DM13 is not limited to this embodiment. As seen in FIG. 11, the plurality of outer spline transmission surfaces 48 each include a radial length RL11 defined from the radially outermost edge 48A to the radially innermost edge 48B. The sum of the radial length RL11 of the plurality of external spline transmission surfaces 48 is equal to or greater than 7 mm. The sum of the radial length RL11 is equal to or greater than 10 mm. The sum of the radial length RL11 is equal to or greater than 15 mm. In this embodiment, the total radial length RL11 is 19.5 mm. However, the sum of the radial length RL11 is not limited to this embodiment. The plurality of external spline teeth 40 have a radial length RL12. The radial length RL12 is respectively defined from the outer spline tooth root circle RC12 to the radial outermost end 40A of the plurality of outer spline teeth 40. The sum of the radial length RL12 is equal to or greater than 12 mm. In this embodiment, the total radial length RL12 is 31.85 mm. However, the sum of the radial length RL12 is not limited to this embodiment. At least one of the at least nine outer spline teeth 40 has an asymmetrical shape with respect to the circumferential tooth tip center line CL1. The circumferential tooth tip centerline CL1 is a line connecting the rotation center axis A1 and the circumferential center point CP1 of the radially outermost end 40A of the outer spline tooth 40. However, at least one of the outer spline teeth 40 may have a symmetrical shape with respect to the circumferential tooth tip center line CL1. At least one of the at least nine external spline teeth 40 includes an external spline transmission surface 48 and an external spline non-transmission surface 50. The outer spline transmission surface 48 has a first outer spline surface angle AG11. The first outer spline surface angle AG11 is defined between the outer spline transmission surface 48 and the first radial line L11. The first radial line L11 extends from the rotation center axis A1 of the bicycle hub assembly 12 to the radially outermost edge 48A of the outer spline transmission surface 48. The first outer circumferential pitch angle PA11 or the second outer circumferential pitch angle PA12 is defined between adjacent first radial lines L11 (see, for example, FIG. 9). The outer spline non-transmission surface 50 has a second outer spline surface angle AG12. The second outer spline surface angle AG12 is defined between the outer spline non-transmission surface 50 and the second radial line L12. The second radial line L12 extends from the rotation center axis A1 of the bicycle hub assembly 12 to the radially outermost edge 50A of the outer spline non-transmission surface 50. In this embodiment, the second outer spline surface angle AG12 is different from the first outer spline surface angle AG11. The first outer spline surface angle AG11 is smaller than the second outer spline surface angle AG12. However, the first outer spline surface angle AG11 may be equal to or greater than the second outer spline surface angle AG12. The first outer spline surface angle AG11 is in the range of 0 degrees to 10 degrees. The second outer spline surface angle AG12 is in the range of 0 degrees to 60 degrees. In this embodiment, the first outer spline surface angle AG11 is 5 degrees. The second outer spline surface angle AG12 is 45 degrees. However, the first outer spline surface angle AG11 and the second outer spline surface angle AG12 are not limited to this embodiment and the above range. As seen in Figures 13 and 14, the brake rotor support body 34 includes at least one additional external spline tooth 52 that is configured to mesh with the bicycle brake rotor 16 (Figure 4). In this embodiment, the brake rotor support body 34 includes an additional base support 54 and a plurality of additional external spline teeth 52. The additional base support 54 has a tubular shape and extends from the hub body 36 along the rotation center axis A1. The additional external spline teeth 52 extend radially outward from the additional base support 54. The total number of additional external spline teeth 52 is 52. However, the total number of additional external spline teeth 52 is not limited to this embodiment. As seen in Figure 14, at least one additional external spline tooth 52 has an additional external spline tip diameter DM14. As seen in Figure 15, the additional external spline top diameter DM14 is larger than the external spline top diameter DM11. The additional outer spline top diameter DM14 is substantially equal to the outer diameter DM13 of the larger diameter portion 42. However, the additional external spline top diameter DM14 may be equal to or smaller than the external spline top diameter DM11. The additional outer spline top diameter DM14 may be different from the outer diameter DM13 of the larger diameter portion 42. As seen in Figure 16, the hub axle 30 includes an axial contact surface 30B1 for contacting the bicycle frame BF. In this embodiment, the axial contact surface 30B1 may be in contact with the first frame BF1 of the bicycle frame BF. The first frame BF1 includes a frame contact surface BF12. In a state where the bicycle hub assembly 12 is fastened to the bicycle frame BF by the wheel fastening structure WS, the axial contact surface 30B1 is in contact with the frame contact surface BF12. The first axial length AL11 is defined from the axial contact surface 30B1 to the larger diameter portion 42 in the axial direction D2 relative to the rotation center axis A1. The first axial length AL11 is in the range of 35 mm to 41 mm. The first axial length AL11 may be equal to or greater than 39 mm. The first axial length AL11 can also be in the range of 35 mm to 37 mm. In this embodiment, the first axial length AL11 is 36.2 mm. However, the first axial length AL11 is not limited to this embodiment and the above range. The larger diameter portion 42 has an axial end 42A farthest from the axial contact surface 30B1 in the axial direction D2. The second axial length AL12 is defined from the axial contact surface 30B1 to the axial end 42A in the axial direction D2. The second axial length AL12 is in the range of 38 mm to 47 mm. The second axial length AL12 can be in the range of 44 mm to 45 mm. The second axial length AL12 can also be in the range of 40 mm to 41 mm. In this embodiment, the second axial length AL12 is 40.75 mm. However, the second axial length AL12 is not limited to this embodiment and the above range. The axial length AL13 of the larger diameter portion 42 is in the range of 3 mm to 6 mm. In this embodiment, the axial length AL13 is 4.55 mm. However, the axial length AL13 is not limited to this embodiment and the above range. As seen in Fig. 17, the bicycle rear sprocket assembly 14 includes at least one sprocket. The at least one sprocket includes a plurality of sprocket wheels. The at least one sprocket includes at least ten sprockets. The at least one sprocket includes at least eleven sprocket wheels. The at least one sprocket includes at least twelve sprockets. The plurality of sprockets includes the largest sprocket SP12. The largest sprocket SP12 has a tooth tip diameter TD1. The plurality of sprockets also includes the smallest sprocket SP1. The smallest sprocket SP1 may also be referred to as a sprocket SP1. The largest sprocket SP12 may also be referred to as a sprocket SP12. In this embodiment, at least one sprocket further includes sprockets SP2 to SP11. The sprocket SP1 corresponds to a high-speed gear. The sprocket SP12 corresponds to a low-speed gear. In this embodiment, the total number of the plurality of sprockets is 12. However, the total number of sprockets of the bicycle rear sprocket assembly 14 is not limited to this embodiment. The smallest sprocket SP1 includes at least one sprocket tooth SP1B. The total number of at least one sprocket SP1B of the smallest sprocket SP1 is 10 or less. In this embodiment, the total number of at least one sprocket SP1B of the smallest sprocket SP1 is 10. However, the total number of at least one sprocket SP1B of the smallest sprocket SP1 is not limited to this embodiment and above. The largest sprocket SP12 includes at least one sprocket SP12B. The total number of teeth of the largest sprocket SP12 is equal to or greater than 39. The total number of teeth of the largest sprocket SP12 is equal to or greater than 45. The total number of at least one sprocket SP12B of the largest sprocket SP12 is equal to or greater than 46. The total number of at least one sprocket SP12B of the largest sprocket SP12 is equal to or greater than 50. In this embodiment, the total number of at least one sprocket SP12B of the largest sprocket SP12 is 51. However, the total number of at least one sprocket SP12B of the largest sprocket SP12 is not limited to this embodiment and above. The tooth tip diameter TD1 is the diameter of a circle defined by the tooth tip of the sprocket SP12B. The sprocket SP2 includes at least one sprocket SP2B. The sprocket SP3 includes at least one sprocket SP3B. The sprocket SP4 includes at least one sprocket SP4B. The sprocket SP5 includes at least one sprocket SP5B. The sprocket SP6 includes at least one sprocket SP6B. The sprocket SP7 includes at least one sprocket SP7B. The sprocket SP8 includes at least one sprocket SP8B. The sprocket SP9 includes at least one sprocket SP9B. The sprocket SP10 includes at least one sprocket SP10B. The sprocket SP11 includes at least one sprocket SP11B. The total number of at least one sprocket SP2B is 12. The total number of at least one sprocket SP3B is 14. The total number of at least one sprocket SP4B is 16. The total number of at least one sprocket SP5B is 18. The total number of at least one sprocket SP6B is 21. The total number of at least one sprocket SP7B is 24. The total number of at least one sprocket SP8B is 28. The total number of at least one sprocket SP9B is 33. The total number of at least one sprocket SP10B is 39. The total number of at least one sprocket SP11B is 45. At least one sprocket has a total number of teeth equal to or greater than 15. For example, the total number of teeth of the sprocket SP4 is 16. The total number of teeth of the sprocket SP5 is 18. The total number of teeth of the sprocket SP6 is 21. The total number of teeth of the sprocket SP7 is 24. The total number of teeth of the sprocket SP8 is 28. The total number of teeth of the sprocket SP9 is 33. The total number of teeth of the sprocket SP10 is 39. The total number of teeth of the sprocket SP11 is 45. The total number of teeth of the sprocket SP12 is 51. The total number of sprocket teeth of each of the sprockets SP2 to SP11 is not limited to this embodiment. At least one of the sprockets SP1 to SP12 may include a total number of teeth equal to or greater than 15 teeth. As seen in FIG. 18, the sprockets SP1 to SP12 are members separated from each other. However, at least one of the sprockets SP1 to SP12 may be at least partially provided integrally with the other of the sprockets SP1 to SP12. The bicycle rear sprocket assembly 14 further includes a sprocket support 56, a plurality of spacers 58, a first ring 59A and a second ring 59B. In the illustrated embodiment, a plurality of sprockets SP1 to SP12 are attached to the sprocket support 56. For example, a plurality of sprockets SP1 to SP12 are attached to the sprocket support 56 by an adhesive. As seen in FIG. 19, the sprocket SP1 includes a sprocket main body SP1A and a plurality of sprocket teeth SP1B. The plural sprocket teeth SP1B extend radially outward from the sprocket main body SP1A. The sprocket SP2 includes a sprocket main body SP2A and a plurality of sprocket teeth SP2B. The plural sprocket teeth SP2B extend radially outward from the sprocket main body SP2A. The sprocket SP3 includes a sprocket main body SP3A and a plurality of sprocket teeth SP3B. The plurality of sprocket teeth SP3B extend radially outward from the sprocket main body SP3A. The sprocket SP4 includes a sprocket main body SP4A and a plurality of sprocket teeth SP4B. A plurality of sprocket teeth SP4B extend radially outward from the sprocket main body SP4A. The sprocket SP5 includes a sprocket main body SP5A and a plurality of sprocket teeth SP5B. A plurality of sprocket teeth SP5B extend radially outward from the sprocket main body SP5A. The first ring 59A is provided between the sprocket SP3 and the sprocket SP4. The second ring 59B is provided between the sprocket SP4 and the sprocket SP5. As seen in FIG. 20, the sprocket SP6 includes a sprocket main body SP6A and a plurality of sprocket teeth SP6B. A plurality of sprocket teeth SP6B extend radially outward from the sprocket main body SP6A. The sprocket SP7 includes a sprocket main body SP7A and a plurality of sprocket teeth SP7B. A plurality of sprocket teeth SP7B extend radially outward from the sprocket main body SP7A. The sprocket SP8 includes a sprocket main body SP8A and a plurality of sprocket teeth SP8B. A plurality of sprocket teeth SP8B extend radially outward from the sprocket main body SP8A. As seen in FIG. 21, the sprocket SP9 includes a sprocket main body SP9A and a plurality of sprocket teeth SP9B. A plurality of sprocket teeth SP9B extend radially outward from the sprocket main body SP9A. The sprocket SP10 includes a sprocket main body SP10A and a plurality of sprocket teeth SP10B. A plurality of sprocket teeth SP10B extend radially outward from the sprocket main body SP10A. The sprocket SP11 includes a sprocket main body SP11A and a plurality of sprocket teeth SP11B. The plural sprocket teeth SP11B extend radially outward from the sprocket main body SP11A. The sprocket SP12 includes a sprocket main body SP12A and a plurality of sprocket teeth SP12B. The plural sprocket teeth SP12B extend radially outward from the sprocket main body SP12A. As seen in FIG. 22, the sprocket support 56 includes a hub engagement portion 60 and a plurality of support arms 62. The plurality of support arms 62 extend radially outward from the hub engaging portion 60. The support arm 62 includes a first attachment portion 62A to an eighth attachment portion 62H. The plurality of spacers 58 includes a plurality of first spacers 58A, a plurality of second spacers 58B, a plurality of third spacers 58C, a plurality of fourth spacers 58D, a plurality of fifth spacers 58E, and a plurality of sixth spacers. Spacer 58F and a plurality of seventh spacers 58G. As seen in FIG. 23, the first spacer 58A is provided between the sprocket SP5 and the sprocket SP6. The second spacer 58B is provided between the sprocket SP6 and the sprocket SP7. The third spacer 58C is provided between the sprocket SP7 and the sprocket SP8. The fourth spacer 58D is provided between the sprocket SP8 and the sprocket SP9. The fifth spacer 58E is provided between the sprocket SP9 and the sprocket SP10. The sixth spacer 58F is provided between the sprocket SP10 and the sprocket SP11. The seventh spacer 58G is provided between the sprocket SP11 and the sprocket SP12. The sprocket SP6 and the first spacer 58A are attached to the first attachment portion 62A by an adhesive structure such as an adhesive. The sprocket SP7 and the second spacer 58B are attached to the second attachment portion 62B by an adhesive structure such as an adhesive. The sprocket SP8 and the third spacer 58C are attached to the third attachment portion 62C by an adhesive structure such as an adhesive. The sprocket SP9 and the fourth spacer 58D are attached to the fourth attachment portion 62D by an adhesive structure such as an adhesive. The sprocket SP10 and the fifth spacer 58E are attached to the fifth attachment portion 62E by an adhesive structure such as an adhesive. The sprocket SP11 and the sixth spacer 58F are attached to the sixth attachment portion 62F by an adhesive structure such as an adhesive. The sprocket SP12 and the seventh spacer 58G are attached to the seventh attachment portion 62G by an adhesive structure such as an adhesive. The sprocket SP5 and the second ring 59B are attached to the eighth attachment portion 62H by an adhesive structure such as an adhesive. The hub engaging portion 60, the sprockets SP1 to SP4, the first ring 59A and the second ring 59B are held between the larger diameter portion 42 and the protruding portion 32B of the locking member 32 in the axial direction D2. In this embodiment, each of the sprockets SP1 to SP12 is made of a metal material such as aluminum, iron, or titanium. Each of the sprocket support 56, the first spacer 58A to the seventh spacer 58G, the first ring 59A, and the second ring 59B are made of a non-metallic material such as a resin material. The sprocket support 56 is made of a non-metallic material including a resin material. However, at least one of the sprockets SP1 to SP12 may be at least partially made of a non-metallic material. At least one of the sprocket support 56, the first spacer 58A to the seventh spacer 58G, the first ring 59A, and the second ring 59B may be at least partially made of a metal material such as aluminum, iron, or titanium. At least one sprocket includes at least one internal spline tooth that is configured to mesh with the bicycle hub assembly 12. As seen in FIGS. 24 and 25, at least one sprocket includes at least ten internal spline teeth that are configured to mesh with the bicycle hub assembly 12. The at least one internal spline tooth includes a plurality of internal spline teeth. Therefore, at least one sprocket includes a plurality of internal spline teeth that are configured to mesh with the bicycle hub assembly 12. In this embodiment, the sprocket SP1 includes at least ten internal spline teeth 64 that are configured to mesh with the bicycle hub assembly 12. In this embodiment, the sprocket SP1 includes internal spline teeth 64 that are configured to mesh with the external spline teeth 40 of the sprocket support body 28 of the bicycle hub assembly 12. The sprocket main body SP1A has an annular shape. The internal spline teeth 64 extend radially inwardly from the sprocket main body SP1A. As seen in FIG. 26, the total number of at least ten internal spline teeth 64 is equal to or greater than 20. The total number of at least ten internal spline teeth 64 is equal to or greater than 25. In this embodiment, the total number of internal spline teeth 64 is 26. However, the total number of internal spline teeth 64 is not limited to this embodiment and the above range. At least ten inner spline teeth 64 have a first inner circumferential pitch angle PA21 and a second inner circumferential pitch angle PA22. At least two of the plurality of internal spline teeth 64 are arranged circumferentially with respect to the rotation center axis A1 of the bicycle rear sprocket assembly 14 at the first internal peripheral pitch angle PA21. At least two of the plurality of internal spline teeth 64 are circumferentially arranged at the second internal peripheral pitch angle PA22 with respect to the rotation center axis A1. In this embodiment, the second inner circumferential pitch angle PA22 is different from the first inner circumferential pitch angle PA21. However, the second inner circumferential pitch angle PA22 may be substantially equal to the first inner circumferential pitch angle PA21. In this embodiment, the internal spline teeth 64 are circumferentially arranged with the first internal pitch angle PA21 in the circumferential direction D1. Two of the internal spline teeth 64 are arranged at the second internal peripheral pitch angle PA22 in the circumferential direction D1. However, at least two of the internal spline teeth 64 may be arranged at another internal pitch angle in the circumferential direction D1. The first inner circumferential pitch angle PA21 is in the range of 10 degrees to 20 degrees. The first inner circumferential pitch angle PA21 is in the range of 12 degrees to 15 degrees. The first inner circumferential pitch angle PA21 is in the range of 13 degrees to 14 degrees. In this embodiment, the first inner circumferential pitch angle PA21 is 13.3 degrees. However, the first inner circumferential pitch angle PA21 is not limited to this embodiment and the above range. The second inner circumferential pitch angle PA22 is in the range of 5 degrees to 30 degrees. In this embodiment, the second inner circumferential pitch angle PA22 is 26 degrees. However, the second inner circumferential pitch angle PA22 is not limited to this embodiment and the above range. At least one of the at least ten internal spline teeth 64 has a first spline shape that is different from the second spline shape of another one of the at least ten internal spline teeth 64. At least one of the at least ten internal spline teeth 64 has a first spline size that is different from the second spline size of another one of the at least ten internal spline teeth 64. At least one of the at least ten internal spline teeth 64 has a cross-sectional shape that is different from the cross-sectional shape of another one of the at least ten internal spline teeth 64. However, as seen in FIG. 27, the internal spline teeth 64 may have the same shape as each other. The internal spline teeth 64 may have the same size as each other. The internal spline teeth 64 may have the same cross-sectional shape as each other. As seen in FIG. 28, at least one internal spline tooth 64 includes an internal spline transmission surface 66 and an internal spline non-transmission surface 68. The at least one internal spline tooth 64 includes a plurality of internal spline teeth 64. The plurality of internal spline teeth 64 includes a plurality of internal spline transmission surfaces 66 for receiving the transmission rotational force F1 from the bicycle hub assembly 12 (FIG. 6) during pedaling. The plurality of internal spline teeth 64 includes a plurality of internal spline non-transmission surfaces 68. The internal spline transmission surface 66 may be in contact with the sprocket support body 28 to transmit the transmission rotation force F1 from the sprocket SP1 to the sprocket support body 28 during pedaling. The internal spline transmission surface 66 faces the transmission rotation direction D11. The inner spline non-transmission surface 68 is provided on the opposite side of the inner spline transmission surface 66 in the circumferential direction D1. The inner spline non-transmission surface 68 faces the reverse rotation direction D12 so that the transmission rotation force F1 is not transmitted from the sprocket SP1 to the sprocket support body 28 during pedaling. At least ten internal spline teeth 64 each have a maximum circumferential width MW2. The inner spline teeth 64 each have a maximum circumferential width MW2. The maximum circumferential width MW2 is defined as the maximum width for receiving the thrust F3 applied to the internal spline teeth 64. The maximum circumferential width MW2 is defined as the linear distance based on the inner spline transmission surface 66. The inner spline transmission surface 66 includes a radially outermost edge 66A and a radially innermost edge 66B. The inner spline transmission surface 66 extends from the radially outermost edge 66A to the radially innermost edge 66B. The second reference circle RC21 is defined on the radially outermost edge 66A and is centered on the rotation center axis A1. The second reference circle RC21 intersects the internal spline non-transmission surface 68 at a reference point 68R. The maximum circumferential width MW2 extends linearly from the radially innermost edge 66B to the reference point 68R in the circumferential direction D1. The inner spline non-drive surface 68 includes a radially outermost edge 68A and a radially innermost edge 68B. The inner spline non-drive surface 68 extends from the radially outermost edge 68A to the radially innermost edge 68B. The reference point 68R is provided between the radially outermost edge 68A and the radially innermost edge 68B. The sum of the maximum width MW2 of the circumference is equal to or greater than 40 mm. The sum of the maximum width MW2 of the circumference is equal to or greater than 45 mm. The sum of the maximum width MW2 of the circumference is equal to or greater than 50 mm. In this embodiment, the sum of the maximum circumferential width MW2 is 50.8 mm. However, the sum of the maximum circumferential width MW2 is not limited to this embodiment. As seen in Figure 29, at least one internal spline tooth 64 has an internal spline tip diameter DM21. At least one internal spline tooth 64 has an internal spline tooth root circle RC22, and the internal spline tooth root circle RC22 has an internal spline tip diameter DM21. However, the inner spline root circle RC22 may have another diameter different from the inner spline tip diameter DM21. The top diameter of the internal spline DM21 is equal to or less than 30 mm. The top diameter of the internal spline DM21 is equal to or greater than 25 mm. The top diameter of the internal spline DM21 is equal to or greater than 29 mm. In this embodiment, the top diameter DM21 of the internal spline is 29.6 mm. However, the inner spline top diameter DM21 is not limited to this embodiment and the above range. In this embodiment, the ratio of the inner spline tip diameter DM21 to the tooth tip diameter TD1 is in the range of 0.1 to 0.2. The tooth tip diameter TD1 of the largest sprocket SP12 (Figure 1) is within the range of 183.7 mm to 207.9 mm. The ratio of the inner spline tip diameter DM21 to the tooth tip diameter TD1 is in the range of 0.14 to 0.17. However, the ratio of the inner spline tip diameter DM21 to the tooth tip diameter TD1 is not limited to the above range. At least one internal spline tooth 64 has an internal spline base diameter DM22 equal to or less than 28 mm. The inner spline bottom diameter DM22 is equal to or greater than 25 mm. The inner spline bottom diameter DM22 is equal to or greater than 27 mm. In this embodiment, the inner spline bottom diameter DM22 is 27.7 mm. However, the inner spline bottom diameter DM22 is not limited to this embodiment and the above range. As seen in Fig. 28, the plurality of inner spline transmission surfaces 66 include a radially outermost edge 66A and a radially innermost edge 66B. Each of the plurality of internal spline transmission surfaces 66 includes a radial length RL21 defined from the radially outermost edge 66A to the radially innermost edge 66B. The sum of the radial length RL21 of the plurality of internal spline transmission surfaces 66 is equal to or greater than 7 mm. The sum of the radial length RL21 is equal to or greater than 10 mm. The sum of the radial length RL21 is equal to or greater than 15 mm. In this embodiment, the total radial length RL21 is 19.5 mm. However, the sum of the radial length RL21 is not limited to this embodiment and the above range. The plurality of internal spline teeth 64 have an additional radial length RL22. The additional radial length RL22 is respectively defined from the inner spline tooth root circle RC22 to the radially innermost end 64A of the plurality of inner spline teeth 64. The sum of the extra radial length RL22 is equal to or greater than 12 mm. In this embodiment, the sum of the additional radial length RL22 is 27.95 mm. However, the sum of the additional radial length RL22 is not limited to this embodiment and the above range. At least one of the internal spline teeth 64 has an asymmetrical shape with respect to the circumferential tooth tip center line CL2. The circumferential tooth tip center line CL2 is a line connecting the rotation center axis A1 and the circumferential center point CP2 of the radially innermost end 64A of the inner spline tooth 64. However, at least one of the internal spline teeth 64 may have a symmetrical shape with respect to the circumferential tooth tip centerline CL2. At least one of the internal spline teeth 64 includes an internal spline transmission surface 66 and an internal spline non-transmission surface 68. The internal spline transmission surface 66 has a first internal spline surface angle AG21. The first inner spline surface angle AG21 is defined between the inner spline transmission surface 66 and the first radial line L21. The first radial line L21 extends from the rotation center axis A1 of the bicycle rear sprocket assembly 14 to the radially outermost edge 66A of the inner spline transmission surface 66. The first inner circumferential pitch angle PA21 or the second inner circumferential pitch angle PA22 is defined between adjacent first radial lines L21 (see, for example, FIG. 26). The inner spline non-transmission surface 68 has a second inner spline surface angle AG22. The second inner spline surface angle AG22 is defined between the inner spline non-transmission surface 68 and the second radial line L22. The second radial line L22 extends from the rotation center axis A1 of the bicycle rear sprocket assembly 14 to the radially outermost edge 68A of the inner spline non-transmission surface 68. In this embodiment, the second internal spline surface angle AG22 is different from the first internal spline surface angle AG21. The first inner spline surface angle AG21 is smaller than the second inner spline surface angle AG22. However, the first internal spline surface angle AG21 may be equal to or greater than the second internal spline surface angle AG22. The first inner spline surface angle AG21 is in the range of 0 degrees to 10 degrees. The second inner spline surface angle AG22 is in the range of 0 degrees to 60 degrees. In this embodiment, the first inner spline surface angle AG21 is 5 degrees. The second inner spline surface angle AG22 is 45 degrees. However, the first inner spline surface angle AG21 and the second inner spline surface angle AG22 are not limited to this embodiment and the above range. As seen in FIG. 30, the inner spline teeth 64 mesh with the outer spline teeth 40 to transmit the transmission rotational force F1 from the sprocket SP1 to the sprocket support body 28. The inner spline transmission surface 66 may be in contact with the outer spline transmission surface 48 to transmit the transmission rotation force F1 from the sprocket SP1 to the sprocket support body 28. In a state where the inner spline transmission surface 66 is in contact with the outer spline transmission surface 48, the inner spline non-transmission surface 68 is spaced apart from the outer spline non-transmission surface 50. As seen in FIG. 31, the sprocket SP2 includes a plurality of internal spline teeth 70. The sprocket SP3 includes a plurality of internal spline teeth 72. The sprocket SP4 includes a plurality of internal spline teeth 74. The first ring 59A includes a plurality of internal spline teeth 76. As seen in FIG. 32, the hub engaging portion 60 of the sprocket support 56 includes a plurality of internal spline teeth 78. The plurality of internal spline teeth 70 have substantially the same structure as the structure of the plurality of internal spline teeth 64. The plurality of internal spline teeth 72 have substantially the same structure as the structure of the plurality of internal spline teeth 64. The plurality of internal spline teeth 74 have substantially the same structure as the structure of the plurality of internal spline teeth 64. The plurality of internal spline teeth 76 have substantially the same structure as the structure of the plurality of internal spline teeth 64. The plurality of internal spline teeth 78 have substantially the same structure as the structure of the plurality of internal spline teeth 64. Therefore, for the sake of brevity, a detailed description will not be given here. As seen in FIG. 6, the bicycle rear sprocket assembly 14 further includes a rear hub abutment surface 80. The rear hub abutment surface 80 is configured to abut the bicycle in the axial direction D2 relative to the rotation center axis A1 of the bicycle rear sprocket assembly 14 in the state where the bicycle rear sprocket assembly 14 is mounted to the bicycle hub assembly 12 Wheel hub assembly 12. In this embodiment, the rear hub abutment surface 80 abuts the larger diameter portion 42 of the sprocket support body 28 in the axial direction D2. The rear hub abutting surface 80 is provided on the hub engaging portion 60 of the sprocket support 56. However, the position of the rear hub abutting surface 80 is not limited to this embodiment. The largest sprocket SP12 has an axial inner surface SP12C and an axial outer surface SP12D disposed on the opposite side of the axial inner surface SP12C in the axial direction D2 relative to the rotation center axis A1 of the bicycle rear sprocket assembly 14 . Compared to the axially inner surface SP12C, the axially outer surface SP12D is closer to the rear hub abutment surface 80 in the axial direction D2. As seen in FIG. 15, the bicycle hub assembly 12 has an axial center plane CPL that halves the bicycle hub assembly 12 in the axial direction D2. The axial center plane CPL of the bicycle hub assembly 12 is perpendicular to the rotation center axis A1. As seen in Figure 6, when the bicycle rear sprocket assembly 14 is mounted to the bicycle rear hub assembly 12, compared to the rear hub abutment surface 80, the axial inner surface SP12C is positioned closer to the bicycle rear hub assembly 12 is the axial center plane CPL. The axial distance AD1 defined between the axially inner surface SP12C and the rear hub abutment surface 80 in the axial direction D2 is equal to or greater than 7 mm. The axial distance AD1 is equal to or greater than 10 mm. However, the axial distance AD1 is not limited to the above range. As seen in FIGS. 9 and 10, the sprocket support body 28 includes a hub indicator 28I provided at the axial end of the base support 41. When viewed along the rotation center axis A1, the hub indicator 28I is disposed in the area of the second outer circumferential pitch angle PA12. In this embodiment, the hub indicator 28I includes dots. However, the hub indicator 28I may include other shapes, such as triangles and lines. In addition, the hub indicator 28I may be a separate member attached to the sprocket support body 28 by, for example, an adhesive structure such as an adhesive. The position of the hub indicator 28I is not limited to this embodiment. As seen in FIGS. 26 and 27, the sprocket SP1 includes a sprocket indicator SP1I provided at the axial end of the sprocket main body SP1A. When viewed along the rotation center axis A1, the sprocket indicator SP1I is arranged in the area of the second inner circumferential pitch angle PA22. In this embodiment, the sprocket indicator SP1I includes dots. However, the sprocket indicator SP1I may include other shapes such as triangles and lines. In addition, the sprocket indicator SP1I may be a separate member attached to the sprocket SP1 by, for example, an adhesive structure such as an adhesive. The position of the sprocket indicator SP1I is not limited to this embodiment. The sprocket indicator SP1I can be provided to any of the other sprockets SP2 to SP12. The sprocket indicator SP1I can also be provided to the sprocket support 56. modify FIG. 33 illustrates a bicycle rear sprocket assembly 214 according to a modification of the bicycle rear sprocket assembly 14. As seen in FIG. 33, the bicycle rear sprocket assembly 214 includes a sprocket SP1 and a plurality of sprockets SP202 to SP212. The sprockets SP202 to SP212 have substantially the same structure as that of the sprockets SP2 to SP12. As seen in FIGS. 33 and 34, for example, the sprocket SP212 includes a sprocket body SP12A and a plurality of sprocket teeth SP12B. One of the sprockets SP202 to SP212 may also be referred to as a first sprocket. Another sprocket adjacent to the first sprocket may also be referred to as a second sprocket. That is, at least one sprocket of the bicycle rear sprocket assembly 214 includes a first sprocket and a second sprocket. The first sprocket has a first total number of teeth. The second sprocket has a second total number of teeth less than the first total number of teeth. The second sprocket is adjacent to the first sprocket in the axial direction D2, and there is no other sprocket between the first sprocket and the second sprocket. As seen in FIG. 33, for example, the first sprocket SP212 has a first total number of teeth of 51. The second sprocket SP211 has a second total number of teeth of 45. The sprockets SP212 and SP211 may also be referred to as the first sprockets SP212 and the second sprockets SP211. The sprockets SP211 and SP210 may also be referred to as the first sprockets SP211 and the second sprockets SP210. The sprockets SP210 and SP209 may also be referred to as the first sprockets SP210 and the second sprockets SP209. The sprockets SP209 and SP208 may also be referred to as the first sprockets SP209 and the second sprockets SP208. The sprockets SP208 and SP207 can also be referred to as the first sprockets SP208 and the second sprockets SP207. The sprockets SP207 and SP206 can also be referred to as the first sprockets SP207 and the second sprockets SP206. The sprockets SP206 and SP205 can also be referred to as the first sprockets SP206 and the second sprockets SP205. The sprockets SP205 and SP204 can also be referred to as the first sprockets SP205 and the second sprockets SP204. The sprockets SP204 and SP203 can also be referred to as the first sprockets SP204 and the second sprockets SP203. The sprockets SP203 and SP202 can also be referred to as the first sprockets SP203 and the second sprockets SP202. The sprockets SP202 and SP1 may also be referred to as the first sprockets SP202 and the second sprockets SP1. As seen in FIG. 34, for example, the first sprocket SP212 includes at least one first displacement promotion area SP212X to promote the first displacement operation of the bicycle chain 20 from the second sprocket SP211 to the first sprocket SP212 . The first sprocket SP212 includes at least one second displacement promotion area SP212Y to promote the second displacement operation of the bicycle chain 20 from the first sprocket SP212 to the second sprocket SP211. In this embodiment, the first sprocket SP212 includes a plurality of first displacement promotion regions SP212X to promote the first displacement operation of the bicycle chain 20 from the second sprocket SP211 to the first sprocket SP212. The first sprocket SP212 includes a plurality of second displacement promoting regions SP212Y to promote the second displacement operation of the bicycle chain 20 from the first sprocket SP212 to the second sprocket SP211. The first sprocket SP212 includes a plurality of first displacement promoting grooves SP212X1 and a plurality of second displacement promoting grooves SP212Y1. The first displacement promoting groove SP212X1 is provided in the first displacement promoting region SP212X. The second displacement promoting groove SP212Y1 is provided in the second displacement promoting region SP212Y. As seen in FIG. 35, the first displacement promoting groove SP212X1 is provided on the axial outer surface SP12D to reduce interference between the first sprocket SP212 and the bicycle chain 20 (FIG. 33) in the first displacement operation. The second displacement promoting groove SP212Y1 is provided on the axially outer surface SP12D to reduce the interference between the first sprocket SP212 and the bicycle chain 20 (FIG. 33) in the second displacement operation. The second displacement promoting groove SP212Y1 is spaced apart from the first displacement promoting groove SP212X1 in the circumferential direction D1. As seen in FIG. 36, the plurality of sprocket teeth SP12B of the first sprocket SP212 includes a plurality of displacement promoting teeth SP212B1 to SP212B3. The displacement promoting teeth SP212B1 to SP212B3 are provided in the second displacement promoting region SP212Y. As seen in FIG. 34, the second displacement promoting region SP212Y is defined in the circumferential direction D1 by the second displacement promoting groove SP212Y1 and the displacement promoting teeth SP212B3. As seen in FIG. 37, the displacement promoting tooth SP212B1 includes the promoting groove SP212R1. The displacement facilitating tooth SP212B2 includes facilitating grooves SP212R2. The displacement facilitating tooth SP212B3 includes facilitating grooves SP212R3. The promotion groove SP212R1 is provided on the axial inner surface SP12C to promote the derailment of the bicycle chain 20 from the first sprocket SP212 in the second shifting operation. The promotion groove SP212R2 is provided on the axial inner surface SP12C to promote the derailment of the bicycle chain 20 from the first sprocket SP212 in the second shifting operation. The promotion groove SP212R3 is provided on the axial inner surface SP12C to promote the derailment of the bicycle chain 20 from the first sprocket SP212 in the second shifting operation. The first displacement promotion area and the second displacement promotion area of each of the sprockets SP202 to SP211 have the same structure as the first displacement promotion area SP212X and the second displacement promotion area SP212Y of the first sprocket SP212, respectively Substantially the same structure. For the sake of brevity, it will not be described in detail here. As used herein, the term "displacement promotion area" is intended to be an area that is deliberately designed to promote the displacement operation of the bicycle chain from one sprocket to another axially adjacent sprocket in the area. As seen in Fig. 38, in the above-described embodiment, the outer spline teeth 40 may include grooves 40G provided between the outer spline transmission surface 48 and the outer spline non-transmission surface 50 in the circumferential direction D1. The groove 40G reduces the weight of the bicycle hub assembly 12. As seen in FIG. 39, in the above-described embodiment, the internal spline teeth 64 may include grooves 64G provided between the internal spline transmission surface 66 and the internal spline non-transmission surface 68 in the circumferential direction D1. The groove 64G reduces the weight of the rear sprocket assembly 14 of the bicycle. As used herein, the term "comprise" and its derivatives are intended to specify the existence of stated features, elements, components, groups, integers, and/or steps, but do not exclude other unstated features, elements, components, groups, Open term for the existence of integers and/or steps. This concept also applies to words with similar meanings, such as the terms "have", "include" and their derivatives. The terms "member", "section", "part", "part", "component", "body" and "structure" when used in the singular form can have the dual meaning of a single part or a plurality of parts. The ordinal numbers such as "first" and "second" described in this application are only identifiers and do not have any other meaning, such as specific order and the like. In addition, for example, the term "first element" by itself does not imply the existence of "second element", and the term "second element" by itself does not imply the existence of "first element". The term "pair" as used herein can encompass configurations in which the paired elements have different shapes or structures from each other except for the configuration in which the paired elements have the same shape or structure as each other. Therefore, the terms "a", "one or more" and "at least one" are used interchangeably herein. Finally, terms of degree such as "substantially", "approximately" and "approximately" as used herein mean a reasonable amount of deviation of the modified term so that the final result does not change significantly. All numerical values described in this application can be understood to include terms such as "substantially", "approximately" and "approximately". Obviously, in view of the above teachings, many modifications and variations of the present invention are possible. Therefore, it should be understood that within the scope of the appended patent application, the present invention can be practiced in other ways than those specifically described herein.

10:自行車傳動系統 12:自行車輪轂總成 14:自行車後鏈輪總成 16:自行車制動轉子 18:曲柄總成 20:自行車鏈條 22:曲柄軸 24:右曲柄臂 26:左曲柄臂 27:前鏈輪 28:鏈輪支撐主體 28A:內部帶螺紋部分 30:輪轂軸 30A:通孔 30B:第一軸端 30B1:軸向接觸表面 30C:第二軸端 32:鎖定構件 32A:外部帶螺紋部分 32B:突出部分 32C:管狀主體部分 32C1:內周邊表面 32D:工具嚙合部分 32D1:工具嚙合凹槽 34:制動轉子支撐主體 36:輪轂主體 36A:第一凸緣 36B:第二凸緣 38:棘輪結構/單向聯軸結構 39A:第一軸承 39B:第二軸承 40:外部花鍵齒 40A:徑向最外端 40G:溝槽 41:基座支撐件 42:較大直徑部分 42A:軸向端 44:凸緣 46:螺旋外部花鍵齒 48:外部花鍵傳動表面 48A:徑向最外邊緣 48B:徑向最內邊緣 50:外部花鍵非傳動表面 50A:徑向最外邊緣 50B:徑向最內邊緣 50R:參考點 52:額外外部花鍵齒 54:額外基座支撐件 56:鏈輪支撐件 58:間隔件 58A:第一間隔件 58B:第二間隔件 58C:第三間隔件 58D:第四間隔件 58E:第五間隔件 58F:第六間隔件 58G:第七間隔件 59A:第一環 59B:第二環 60:輪轂嚙合部分 62:支撐臂 62A:第一附接部分 62B:第二附接部分 62C:第三附接部分 62D:第四附接部分 62E:第五附接部分 62F:第六附接部分 62G:第七附接部分 62H:第八附接部分 64:內部花鍵齒 64A:徑向最內端 64G:溝槽 66:內部花鍵傳動表面 66A:徑向最外邊緣 66B:徑向最內邊緣 68:內部花鍵非傳動表面 68A:徑向最外邊緣 68B:徑向最內邊緣 68R:參考點 70:內部花鍵齒 72:內部花鍵齒 74:內部花鍵齒 76:內部花鍵齒 78:內部花鍵齒 80:後輪轂鄰接表面 214:自行車後鏈輪總成 A1:旋轉中心軸線 A2:中心軸線 AD1:軸向距離 AG11:第一外部花鍵表面角 AG12:第二外部花鍵表面角 AG21:第一內部花鍵表面角 AG22:第二內部花鍵表面角 AL11:第一軸向長度 AL12:第二軸向長度 AL13:軸向長度 BF:自行車框架 BF1:第一框架 BF2:第二框架 BF11:第一凹槽 BF12:框架接觸表面 BF21:第二凹槽 CL1:圓周齒尖中心線 CL2:圓周齒尖中心線 CP1:圓周中心點 CP2:圓周中心點 CPL:軸向中心平面 D1:圓周方向 D2:軸向方向 D11:傳動旋轉方向 D12:反向旋轉方向 DM11:外部花鍵頂徑 DM12:外部花鍵底徑 DM13:外徑 DM14:額外外部花鍵頂徑 DM21:內部花鍵頂徑 DM22:內部花鍵底徑 ED1:第一外徑 ED2:第二外徑 F1:傳動旋轉力 F2:推力 F3:推力 IV-IV:線 L11:第一徑向線 L12:第二徑向線 L21:第一徑向線 L22:第二徑向線 MW1:圓周最大寬度 MW2:圓周最大寬度 PA11:第一外部周節角 PA12:第二外部周節角 PA21:第一內部周節角 PA22:第二內部周節角 RC11:第一參考圓 RC12:外部花鍵齒根圓 RC21:第二參考圓 RC22:內部花鍵齒根圓 RL11:徑向長度 RL12:徑向長度 RL21:徑向長度 RL22:額外徑向長度 SP1:鏈輪 SP1A:鏈輪主體 SP1B:鏈輪齒 SP2:鏈輪 SP2A:鏈輪主體 SP2B:鏈輪齒 SP3:鏈輪 SP3A:鏈輪主體 SP3B:鏈輪齒 SP4:鏈輪 SP4A:鏈輪主體 SP4B:鏈輪齒 SP5:鏈輪 SP5A:鏈輪主體 SP5B:鏈輪齒 SP6:鏈輪 SP6A:鏈輪主體 SP6B:鏈輪齒 SP7:鏈輪 SP7A:鏈輪主體 SP7B:鏈輪齒 SP8:鏈輪 SP8A:鏈輪主體 SP8B:鏈輪齒 SP9:鏈輪 SP9A:鏈輪主體 SP9B:鏈輪齒 SP10:鏈輪 SP10A:鏈輪主體 SP10B:鏈輪齒 SP11:鏈輪 SP11A:鏈輪主體 SP11B:鏈輪齒 SP12:鏈輪 SP12A:鏈輪主體 SP12B:鏈輪齒 SP12C:軸向內表面 SP12D:軸向外表面 SP202:鏈輪 SP203:鏈輪 SP204:鏈輪 SP205:鏈輪 SP206:鏈輪 SP207:鏈輪 SP208:鏈輪 SP209:鏈輪 SP210:鏈輪 SP211:鏈輪 SP212:鏈輪 SP212B1:移位促進齒 SP212B2:移位促進齒 SP212B3:移位促進齒 SP212R1:促進凹槽 SP212R2:促進凹槽 SP212R3:促進凹槽 SP212X:第一移位促進區域 SP212X1:第一移位促進凹槽 SP212Y:第二移位促進區域 SP212Y1:第二移位促進凹槽 TD1:齒尖直徑 WS:車輪緊固結構 WS1:緊固桿 XVI-XVI:線 XXIII-XXIII:線10: Bicycle transmission system 12: Bicycle wheel assembly 14: Bicycle rear sprocket assembly 16: Bicycle brake rotor 18: crank assembly 20: Bicycle chain 22: crankshaft 24: Right crank arm 26: Left crank arm 27: front sprocket 28: Sprocket support body 28A: Internal threaded part 30: Hub axle 30A: Through hole 30B: The first shaft end 30B1: Axial contact surface 30C: second shaft end 32: Locking member 32A: External threaded part 32B: Protruding part 32C: Tubular body part 32C1: inner peripheral surface 32D: Tool engagement part 32D1: Tool engagement groove 34: Brake rotor support body 36: Hub body 36A: First flange 36B: second flange 38: Ratchet structure / one-way coupling structure 39A: First bearing 39B: second bearing 40: External spline tooth 40A: Radial outermost end 40G: groove 41: pedestal support 42: Larger diameter part 42A: Axial end 44: flange 46: Spiral external spline tooth 48: External spline transmission surface 48A: radial outermost edge 48B: radial innermost edge 50: External spline non-transmission surface 50A: radial outermost edge 50B: radial innermost edge 50R: reference point 52: Extra external spline tooth 54: Additional base support 56: Sprocket support 58: Spacer 58A: First spacer 58B: second spacer 58C: Third spacer 58D: Fourth spacer 58E: Fifth spacer 58F: Sixth spacer 58G: Seventh spacer 59A: First ring 59B: The second ring 60: Wheel hub engagement part 62: Support arm 62A: The first attachment part 62B: second attachment part 62C: Third attachment part 62D: Fourth attachment part 62E: Fifth attachment part 62F: The sixth attachment part 62G: seventh attachment part 62H: Eighth attachment part 64: Internal spline tooth 64A: radial innermost end 64G: groove 66: Internal spline transmission surface 66A: radial outermost edge 66B: radial innermost edge 68: Internal spline non-transmission surface 68A: radial outermost edge 68B: radial innermost edge 68R: reference point 70: Internal spline tooth 72: Internal spline tooth 74: Internal spline tooth 76: Internal spline tooth 78: Internal spline tooth 80: Rear wheel hub abutment surface 214: Bicycle rear sprocket assembly A1: Rotation center axis A2: Central axis AD1: Axial distance AG11: Surface angle of the first external spline AG12: second external spline surface angle AG21: Surface angle of the first internal spline AG22: second inner spline surface angle AL11: first axial length AL12: second axial length AL13: Axial length BF: Bicycle frame BF1: The first frame BF2: The second frame BF11: The first groove BF12: Frame contact surface BF21: The second groove CL1: Circumferential tooth tip centerline CL2: Circumferential tooth tip centerline CP1: Circle center point CP2: Circle center point CPL: axial center plane D1: circumferential direction D2: axial direction D11: Transmission rotation direction D12: Reverse rotation direction DM11: Top diameter of external spline DM12: Bottom diameter of external spline DM13: Outer diameter DM14: Additional external spline top diameter DM21: Top diameter of internal spline DM22: bottom diameter of internal spline ED1: the first outer diameter ED2: second outer diameter F1: Transmission rotation force F2: thrust F3: thrust IV-IV: Line L11: First radial line L12: Second radial line L21: First radial line L22: Second radial line MW1: Maximum width of circumference MW2: Maximum width of circumference PA11: The first outer peripheral corner PA12: Second outer circumferential corner PA21: The first inner circumferential corner PA22: The second inner circumferential corner RC11: The first reference circle RC12: External spline tooth root circle RC21: Second reference circle RC22: Internal spline tooth root circle RL11: Radial length RL12: Radial length RL21: Radial length RL22: Extra radial length SP1: Sprocket SP1A: Sprocket body SP1B: Sprocket SP2: Sprocket SP2A: Sprocket body SP2B: Sprocket SP3: Sprocket SP3A: Sprocket body SP3B: Sprocket SP4: Sprocket SP4A: Sprocket body SP4B: Sprocket SP5: Sprocket SP5A: Sprocket body SP5B: Sprocket SP6: Sprocket SP6A: Sprocket body SP6B: Sprocket SP7: Sprocket SP7A: Sprocket body SP7B: Sprocket SP8: Sprocket SP8A: Sprocket body SP8B: Sprocket SP9: Sprocket SP9A: Sprocket body SP9B: Sprocket SP10: Sprocket SP10A: Sprocket body SP10B: Sprocket SP11: Sprocket SP11A: Sprocket body SP11B: Sprocket SP12: Sprocket SP12A: Sprocket body SP12B: Sprocket SP12C: Axial inner surface SP12D: Axial outer surface SP202: Sprocket SP203: Sprocket SP204: Sprocket SP205: Sprocket SP206: Sprocket SP207: Sprocket SP208: Sprocket SP209: Sprocket SP210: Sprocket SP211: Sprocket SP212: Sprocket SP212B1: Displacement promoting tooth SP212B2: Displacement promoting tooth SP212B3: Displacement promoting tooth SP212R1: Promote groove SP212R2: Promote groove SP212R3: Promote groove SP212X: The first shift promotion area SP212X1: The first displacement promotes the groove SP212Y: Second shift promotion area SP212Y1: The second displacement promotes the groove TD1: Tooth tip diameter WS: Wheel fastening structure WS1: Fastening rod XVI-XVI: line XXIII-XXIII: line

當結合附圖考慮時，參考以下詳細描述，本發明之更完整評價及其許多伴隨優點將易於獲得，同樣變得更好理解，其中： 圖1為根據一實施例之自行車傳動系統的示意圖。 圖2為圖1中所說明之自行車傳動系統的分解透視圖。 圖3為圖2中所說明之自行車傳動系統的另一透視圖。 圖4為沿圖2之線IV-IV截取之自行車傳動系統的橫截面圖。 圖5為圖2中所說明之自行車傳動系統之自行車輪轂總成的分解透視圖。 圖6為圖4中所說明之自行車傳動系統的放大橫截面圖。 圖7為圖2中所說明之自行車傳動系統之自行車輪轂總成之鏈輪支撐主體的透視圖。 圖8為圖2中所說明之自行車傳動系統之自行車輪轂總成之鏈輪支撐主體的另一透視圖。 圖9為圖7中所說明之鏈輪支撐主體的側視圖。 圖10為根據修改之自行車輪轂總成之鏈輪支撐主體的側視圖。 圖11為圖7中所說明之鏈輪支撐主體的放大橫截面圖。 圖12為圖7中所說明之鏈輪支撐主體的橫截面圖。 圖13為圖2中所說明之自行車傳動系統之自行車輪轂總成的透視圖。 圖14為圖2中所說明之自行車傳動系統之自行車輪轂總成的側視圖。 圖15為圖2中所說明之自行車傳動系統之自行車輪轂總成的後視圖。 圖16為沿圖5之線XVI-XVI截取之自行車輪轂總成的橫截面圖。 圖17為圖2中所說明之自行車傳動系統之自行車後鏈輪總成的側視圖。 圖18為圖17中所說明之自行車後鏈輪總成的分解透視圖。 圖19為圖17中所說明之自行車後鏈輪總成的部分分解透視圖。 圖20為圖17中所說明之自行車後鏈輪總成的另一部分分解透視圖。 圖21為圖17中所說明之自行車後鏈輪總成的另一部分分解透視圖。 圖22為圖17中所說明之自行車後鏈輪總成的另一部分分解透視圖。 圖23為沿圖17之線XXIII-XXIII截取之自行車後鏈輪總成的透視橫截面圖。 圖24為圖17中所說明之自行車後鏈輪總成之最小鏈輪的透視圖。 圖25為圖17中所說明之自行車後鏈輪總成之最小鏈輪的另一透視圖。 圖26為圖17中所說明之自行車後鏈輪總成之最小鏈輪的側視圖。 圖27為根據修改之最小鏈輪的側視圖。 圖28為圖24中所說明之最小鏈輪的放大截面視圖。 圖29為圖24中所說明之最小鏈輪的橫截面圖。 圖30為圖2中所說明之自行車傳動系統之鏈輪支撐主體及最小鏈輪的橫截面圖。 圖31為圖17中所說明之自行車後鏈輪總成的部分分解透視圖。 圖32為圖17中所說明之自行車後鏈輪總成之鏈輪支撐件的透視圖。 圖33為根據修改之自行車後鏈輪總成的側視圖。 圖34為圖33中所說明之自行車後鏈輪總成之第一鏈輪的側視圖。 圖35為圖33中所說明之自行車後鏈輪總成之第一鏈輪的部分透視圖。 圖36為圖33中所說明之自行車後鏈輪總成之第一鏈輪的另一側視圖。 圖37為圖33中所說明之自行車後鏈輪總成之第一鏈輪的另一部分透視圖。 圖38為根據修改之鏈輪支撐主體的放大橫截面圖。 圖39為根據修改之最小鏈輪的放大橫截面圖。When considered in conjunction with the accompanying drawings, with reference to the following detailed description, a more complete evaluation of the present invention and many of its accompanying advantages will be easily obtained, and also become better understood, among which: Fig. 1 is a schematic diagram of a bicycle transmission system according to an embodiment. Fig. 2 is an exploded perspective view of the bicycle transmission system illustrated in Fig. 1. Fig. 3 is another perspective view of the bicycle transmission system illustrated in Fig. 2. Fig. 4 is a cross-sectional view of the bicycle transmission system taken along the line IV-IV of Fig. 2. Fig. 5 is an exploded perspective view of the bicycle hub assembly of the bicycle transmission system illustrated in Fig. 2. Fig. 6 is an enlarged cross-sectional view of the bicycle transmission system illustrated in Fig. 4. 7 is a perspective view of the sprocket supporting body of the bicycle hub assembly of the bicycle transmission system illustrated in FIG. 2. 8 is another perspective view of the sprocket supporting body of the bicycle hub assembly of the bicycle transmission system illustrated in FIG. 2. Fig. 9 is a side view of the sprocket supporting body illustrated in Fig. 7. Fig. 10 is a side view of the sprocket supporting body of the bicycle hub assembly according to the modification. Fig. 11 is an enlarged cross-sectional view of the sprocket supporting body illustrated in Fig. 7. Fig. 12 is a cross-sectional view of the sprocket supporting body illustrated in Fig. 7. Fig. 13 is a perspective view of the bicycle hub assembly of the bicycle transmission system illustrated in Fig. 2. Fig. 14 is a side view of the bicycle hub assembly of the bicycle transmission system illustrated in Fig. 2. Fig. 15 is a rear view of the bicycle hub assembly of the bicycle transmission system illustrated in Fig. 2. Figure 16 is a cross-sectional view of the bicycle hub assembly taken along the line XVI-XVI of Figure 5; Fig. 17 is a side view of the bicycle rear sprocket assembly of the bicycle transmission system illustrated in Fig. 2. Fig. 18 is an exploded perspective view of the bicycle rear sprocket assembly illustrated in Fig. 17. Fig. 19 is a partially exploded perspective view of the bicycle rear sprocket assembly illustrated in Fig. 17. Fig. 20 is an exploded perspective view of another part of the bicycle rear sprocket assembly illustrated in Fig. 17. Fig. 21 is an exploded perspective view of another part of the bicycle rear sprocket assembly illustrated in Fig. 17. Fig. 22 is another partial exploded perspective view of the bicycle rear sprocket assembly illustrated in Fig. 17. Figure 23 is a perspective cross-sectional view of the bicycle rear sprocket assembly taken along the line XXIII-XXIII of Figure 17; Fig. 24 is a perspective view of the smallest sprocket of the bicycle rear sprocket assembly illustrated in Fig. 17. Fig. 25 is another perspective view of the smallest sprocket of the bicycle rear sprocket assembly illustrated in Fig. 17. Fig. 26 is a side view of the smallest sprocket of the bicycle rear sprocket assembly illustrated in Fig. 17. Figure 27 is a side view of the smallest sprocket according to the modification. Figure 28 is an enlarged cross-sectional view of the smallest sprocket illustrated in Figure 24. Figure 29 is a cross-sectional view of the smallest sprocket illustrated in Figure 24. 30 is a cross-sectional view of the sprocket supporting body and the smallest sprocket of the bicycle transmission system illustrated in FIG. 2. Figure 31 is a partially exploded perspective view of the bicycle rear sprocket assembly illustrated in Figure 17; Figure 32 is a perspective view of the sprocket support of the bicycle rear sprocket assembly illustrated in Figure 17; Figure 33 is a side view of the rear sprocket assembly of a bicycle according to the modification. Figure 34 is a side view of the first sprocket of the bicycle rear sprocket assembly illustrated in Figure 33. 35 is a partial perspective view of the first sprocket of the bicycle rear sprocket assembly illustrated in FIG. 33. Figure 36 is another side view of the first sprocket of the bicycle rear sprocket assembly illustrated in Figure 33. Fig. 37 is another partial perspective view of the first sprocket of the bicycle rear sprocket assembly illustrated in Fig. 33; Fig. 38 is an enlarged cross-sectional view of the sprocket supporting body according to the modification. Figure 39 is an enlarged cross-sectional view of the smallest sprocket according to the modification.

14:自行車後鏈輪總成 14: Bicycle rear sprocket assembly

20:自行車鏈條 20: Bicycle chain

A1:旋轉中心軸線 A1: Rotation center axis

D1:圓周方向 D1: circumferential direction

D11:傳動旋轉方向 D11: Transmission rotation direction

D12:反向旋轉方向 D12: Reverse rotation direction

SP1:鏈輪 SP1: Sprocket

SP1B:鏈輪齒 SP1B: Sprocket

SP2:鏈輪 SP2: Sprocket

SP2B:鏈輪齒 SP2B: Sprocket

SP3:鏈輪 SP3: Sprocket

SP3B:鏈輪齒 SP3B: Sprocket

SP4:鏈輪 SP4: Sprocket

SP4B:鏈輪齒 SP4B: Sprocket

SP5:鏈輪 SP5: Sprocket

SP5B:鏈輪齒 SP5B: Sprocket

SP6:鏈輪 SP6: Sprocket

SP6B:鏈輪齒 SP6B: Sprocket

SP7:鏈輪 SP7: Sprocket

SP7B:鏈輪齒 SP7B: Sprocket

SP8:鏈輪 SP8: Sprocket

SP8B:鏈輪齒 SP8B: Sprocket

SP9:鏈輪 SP9: Sprocket

SP9B:鏈輪齒 SP9B: Sprocket

SP10:鏈輪 SP10: Sprocket

SP10B:鏈輪齒 SP10B: Sprocket

SP11:鏈輪 SP11: Sprocket

SP11B:鏈輪齒 SP11B: Sprocket

SP12:鏈輪 SP12: Sprocket

SP12B:鏈輪齒 SP12B: Sprocket

TD1:齒尖直徑 TD1: Tooth tip diameter

XXIII-XXIII:線 XXIII-XXIII: line

Claims (51)

一種自行車後鏈輪總成，其包含： 至少一個鏈輪，其具有等於或大於15之一總齒數，該至少一個鏈輪包括經構形以與一自行車輪轂總成嚙合之至少十個內部花鍵齒。A bicycle rear sprocket assembly, which includes: At least one sprocket having a total number of teeth equal to or greater than 15, the at least one sprocket including at least ten internal spline teeth configured to mesh with a bicycle hub assembly. 如請求項1之自行車後鏈輪總成，其中 該至少十個內部花鍵齒之一總數目等於或大於20。Such as the bicycle rear sprocket assembly of claim 1, where The total number of one of the at least ten internal spline teeth is equal to or greater than 20. 如請求項2之自行車後鏈輪總成，其中 該至少十個內部花鍵齒之該總數目等於或大於25。Such as the bicycle rear sprocket assembly of claim 2, where The total number of the at least ten internal spline teeth is equal to or greater than 25. 如請求項1之自行車後鏈輪總成，其中 該至少十個內部花鍵齒具有一第一內部周節角及不同於該第一內部周節角之一第二內部周節角。Such as the bicycle rear sprocket assembly of claim 1, where The at least ten inner spline teeth have a first inner circumferential pitch angle and a second inner circumferential pitch angle that is different from the first inner circumferential pitch angle. 如請求項1之自行車後鏈輪總成，其中 該至少一個鏈輪包括至少十個鏈輪。Such as the bicycle rear sprocket assembly of claim 1, where The at least one sprocket includes at least ten sprockets. 如請求項1之自行車後鏈輪總成，其中 該至少一個鏈輪包括至少十一個鏈輪。Such as the bicycle rear sprocket assembly of claim 1, where The at least one sprocket includes at least eleven sprocket wheels. 如請求項1之自行車後鏈輪總成，其中 該至少一個鏈輪包括至少十二個鏈輪。Such as the bicycle rear sprocket assembly of claim 1, where The at least one sprocket includes at least twelve sprockets. 如請求項1之自行車後鏈輪總成，其中 該至少一個鏈輪包括複數個鏈輪及經構形以與一自行車輪轂總成嚙合之至少一個內部花鍵齒， 該複數個鏈輪包括具有一齒尖直徑之一最大鏈輪， 該至少一個內部花鍵齒具有一內部花鍵底徑，且 該內部花鍵底徑對該齒尖直徑之一比率在0.1至0.2之範圍內。Such as the bicycle rear sprocket assembly of claim 1, where The at least one sprocket includes a plurality of sprocket wheels and at least one internal spline tooth configured to mesh with a bicycle hub assembly, The plurality of sprockets includes one of the largest sprockets having a tooth tip diameter, The at least one internal spline tooth has an internal spline bottom diameter, and The ratio of the inner spline bottom diameter to the tooth tip diameter is in the range of 0.1 to 0.2. 如請求項1之自行車後鏈輪總成，其中 該至少一個鏈輪包括： 一第一鏈輪，其具有一第一總齒數；及 一第二鏈輪，其具有小於該第一總齒數之一第二總齒數， 該第一鏈輪包括： 至少一個第一移位促進區域，其用以促進一自行車鏈自該第二鏈輪移位至該第一鏈輪之一第一移位操作，及 至少一個第二移位促進區域，其用以促進該自行車鏈自該第一鏈輪移位至該第二鏈輪之一第二移位操作。Such as the bicycle rear sprocket assembly of claim 1, where The at least one sprocket includes: A first sprocket having a first total number of teeth; and A second sprocket having a second total number of teeth which is less than the first total number of teeth, The first sprocket includes: At least one first displacement promotion area for promoting a first displacement operation of a bicycle chain from the second sprocket to the first sprocket, and At least one second displacement promotion area is used to promote a second displacement operation of the bicycle chain from the first sprocket to the second sprocket. 如請求項1之自行車後鏈輪總成，其進一步包含 一鎖定構件，其經構形以阻止安裝於一自行車輪轂總成上之該至少一個鏈輪相對於該自行車後鏈輪總成之一旋轉中心軸線的一軸向移動，其中 該鎖定構件包括： 一管狀主體部分，其具有一中心軸線；及 一突出部分，其相對於該管狀主體部分之該中心軸線自該管狀主體部分徑向向外延伸， 該管狀主體部分具有經構形以與該自行車輪轂總成之一內部帶螺紋部分嚙合的一外部帶螺紋部分，且 該突出部分經構形以鄰接該至少一個鏈輪。Such as the bicycle rear sprocket assembly of claim 1, which further includes A locking member configured to prevent an axial movement of the at least one sprocket mounted on a bicycle hub assembly with respect to a central axis of rotation of the bicycle rear sprocket assembly, wherein The locking member includes: A tubular body part having a central axis; and A protruding portion extending radially outward from the tubular body portion with respect to the central axis of the tubular body portion, The tubular body portion has an outer threaded portion configured to engage with an inner threaded portion of the bicycle hub assembly, and The protrusion is configured to abut the at least one sprocket. 如請求項10之自行車後鏈輪總成，其中 該管狀主體部分具有等於或小於26 mm之一第一外徑。Such as the bicycle rear sprocket assembly of claim 10, where The tubular body portion has a first outer diameter equal to or smaller than 26 mm. 如請求項11之自行車後鏈輪總成，其中 該第一外徑等於或大於25 mm。Such as the bicycle rear sprocket assembly of claim 11, where The first outer diameter is equal to or greater than 25 mm. 如請求項10之自行車後鏈輪總成，其中 該突出部分具有等於或小於32 mm之一第二外徑。Such as the bicycle rear sprocket assembly of claim 10, where The protruding portion has a second outer diameter equal to or smaller than 32 mm. 如請求項13之自行車後鏈輪總成，其中 該第二外徑等於或大於30 mm。Such as the bicycle rear sprocket assembly of claim 13, where The second outer diameter is equal to or greater than 30 mm. 如請求項10之自行車後鏈輪總成，其中 該鎖定構件具有一工具嚙合部分。Such as the bicycle rear sprocket assembly of claim 10, where The locking member has a tool engaging portion. 如請求項1之自行車後鏈輪總成，其進一步包含 一鏈輪支撐件，其中 該至少一個鏈輪包括附接至該鏈輪支撐件之複數個鏈輪。Such as the bicycle rear sprocket assembly of claim 1, which further includes A sprocket support, where The at least one sprocket includes a plurality of sprockets attached to the sprocket support. 如請求項16之自行車後鏈輪總成，其中 該複數個鏈輪藉由一黏附劑附接至該鏈輪支撐件。Such as the bicycle rear sprocket assembly of claim 16, where The plurality of sprockets are attached to the sprocket support by an adhesive. 如請求項16之自行車後鏈輪總成，其中 該鏈輪支撐件由包括一樹脂材料之一非金屬材料製成。Such as the bicycle rear sprocket assembly of claim 16, where The sprocket support is made of a non-metallic material including a resin material. 如請求項1之自行車後鏈輪總成，其進一步包含 一後輪轂鄰接表面，其經構形以在該自行車後鏈輪總成安裝至一自行車輪轂總成之一狀態中在相對於該自行車後鏈輪總成之一旋轉中心軸線的一軸向方向上鄰接該自行車輪轂總成，其中 該至少一個鏈輪包括複數個鏈輪，該複數個鏈輪包括一最大鏈輪，該最大鏈輪具有一軸向內表面及在該軸向方向上設置於該軸向內表面之一反向側上的一軸向外表面，相比於該軸向內表面，該軸向外表面在該軸向方向上更接近該後輪轂鄰接表面，且 在該軸向方向上界定於該軸向內表面與該後輪轂鄰接表面之間的一軸向距離等於或大於7 mm。Such as the bicycle rear sprocket assembly of claim 1, which further includes A rear hub abutment surface configured to be in an axial direction relative to a central axis of rotation of the bicycle rear sprocket assembly in a state where the bicycle rear sprocket assembly is mounted to a bicycle hub assembly Adjacent to the bicycle hub assembly, where The at least one sprocket includes a plurality of sprocket wheels, the plurality of sprocket wheels includes a largest sprocket, the largest sprocket has an axial inner surface and a reverse of the axial inner surface in the axial direction An axial outer surface on the side, the axial outer surface is closer to the rear hub abutment surface in the axial direction than the axial inner surface, and An axial distance defined between the axial inner surface and the abutting surface of the rear hub in the axial direction is equal to or greater than 7 mm. 如請求項19之自行車後鏈輪總成，其中 該軸向距離等於或大於10 mm。Such as the bicycle rear sprocket assembly of claim 19, where The axial distance is equal to or greater than 10 mm. 一種自行車後鏈輪總成，其包含： 至少一個鏈輪，其具有等於或大於15之一總齒數，該至少一個鏈輪包括經構形以與一自行車輪轂總成嚙合之至少一個內部花鍵齒，該至少一個內部花鍵齒具有等於或小於30 mm之一內部花鍵底徑。A bicycle rear sprocket assembly, which includes: At least one sprocket having a total number of teeth equal to or greater than 15, the at least one sprocket including at least one internal spline tooth configured to mesh with a bicycle hub assembly, the at least one internal spline tooth having a tooth equal to Or one of the inner spline bottom diameters less than 30 mm. 如請求項21之自行車後鏈輪總成，其中 該內部花鍵底徑等於或大於25 mm。Such as the bicycle rear sprocket assembly of claim 21, of which The bottom diameter of the internal spline is equal to or greater than 25 mm. 如請求項21之自行車後鏈輪總成，其中 該內部花鍵底徑等於或大於29 mm。Such as the bicycle rear sprocket assembly of claim 21, of which The bottom diameter of the internal spline is equal to or greater than 29 mm. 如請求項21之自行車後鏈輪總成，其中 該至少一個內部花鍵齒具有等於或小於28 mm之一內部花鍵頂徑。Such as the bicycle rear sprocket assembly of claim 21, of which The at least one internal spline tooth has an internal spline top diameter equal to or less than 28 mm. 如請求項24之自行車後鏈輪總成，其中 該內部花鍵頂徑等於或大於25 mm。Such as the bicycle rear sprocket assembly of claim 24, of which The top diameter of the internal spline is equal to or greater than 25 mm. 如請求項24之自行車後鏈輪總成，其中 該內部花鍵頂徑等於或大於27 mm。Such as the bicycle rear sprocket assembly of claim 24, of which The top diameter of the internal spline is equal to or greater than 27 mm. 如請求項21之自行車後鏈輪總成，其中 該至少一個內部花鍵齒包括複數個內部花鍵齒，該複數個內部花鍵齒包括用以在踩踏期間接收來自該自行車輪轂總成之一傳動旋轉力的複數個內部花鍵傳動表面， 該複數個內部花鍵傳動表面各自包括 一徑向最外邊緣， 一徑向最內邊緣，及 一徑向長度，其係自該徑向最外邊緣至該徑向最內邊緣界定，且 該等徑向長度之一總和等於或大於7 mm。Such as the bicycle rear sprocket assembly of claim 21, of which The at least one internal spline tooth includes a plurality of internal spline teeth, the plurality of internal spline teeth includes a plurality of internal spline transmission surfaces for receiving a transmission rotational force from one of the bicycle hub assembly during pedaling, The plurality of internal spline transmission surfaces each include A radially outermost edge, A radially innermost edge, and A radial length defined from the radially outermost edge to the radially innermost edge, and The sum of one of the radial lengths is equal to or greater than 7 mm. 如請求項27之自行車後鏈輪總成，其中 該等徑向長度之該總和等於或大於10 mm。Such as the bicycle rear sprocket assembly of claim 27, where The sum of the radial lengths is equal to or greater than 10 mm. 如請求項27之自行車後鏈輪總成，其中 該等徑向長度之該總和等於或大於15 mm。Such as the bicycle rear sprocket assembly of claim 27, where The sum of the radial lengths is equal to or greater than 15 mm. 如請求項21之自行車後鏈輪總成，其中 該至少一個鏈輪包括至少十個鏈輪。Such as the bicycle rear sprocket assembly of claim 21, of which The at least one sprocket includes at least ten sprockets. 如請求項21之自行車後鏈輪總成，其中 該至少一個鏈輪包括至少十一個鏈輪。Such as the bicycle rear sprocket assembly of claim 21, of which The at least one sprocket includes at least eleven sprocket wheels. 如請求項21之自行車後鏈輪總成，其中 該至少一個鏈輪包括至少十二個鏈輪。Such as the bicycle rear sprocket assembly of claim 21, of which The at least one sprocket includes at least twelve sprockets. 如請求項21之自行車後鏈輪總成，其中 該至少一個鏈輪包括複數個鏈輪， 該複數個鏈輪包括具有一齒尖直徑之一最大鏈輪，且 該內部花鍵底徑對該齒尖直徑之一比率在0.1至0.2之範圍內。Such as the bicycle rear sprocket assembly of claim 21, of which The at least one sprocket includes a plurality of sprockets, The plurality of sprockets includes one of the largest sprockets having a tooth tip diameter, and The ratio of the inner spline bottom diameter to the tooth tip diameter is in the range of 0.1 to 0.2. 如請求項21之自行車後鏈輪總成，其中 該至少一個鏈輪包括： 一第一鏈輪，其具有一第一總齒數；及 一第二鏈輪，其具有小於該第一總齒數之一第二總齒數， 該第一鏈輪包括： 至少一個第一移位促進區域，其用以促進一自行車鏈自該第二鏈輪移位至該第一鏈輪之一第一移位操作；及 至少一個第二移位促進區域，其用以促進該自行車鏈自該第一鏈輪移位至該第二鏈輪之一第二移位操作。Such as the bicycle rear sprocket assembly of claim 21, of which The at least one sprocket includes: A first sprocket having a first total number of teeth; and A second sprocket having a second total number of teeth which is less than the first total number of teeth, The first sprocket includes: At least one first displacement promotion area for promoting a first displacement operation of a bicycle chain from the second sprocket to the first sprocket; and At least one second displacement promotion area is used to promote a second displacement operation of the bicycle chain from the first sprocket to the second sprocket. 如請求項21之自行車後鏈輪總成，其進一步包含 一鎖定構件，其經構形以阻止安裝於一自行車輪轂總成上之該至少一個鏈輪相對於該自行車後鏈輪總成之一旋轉中心軸線的一軸向移動，其中 該鎖定構件包括： 一管狀主體部分，其具有一中心軸線；及 一突出部分，其相對於該管狀主體部分之該中心軸線自該管狀主體部分徑向向外延伸， 該管狀主體部分具有經構形以與該自行車輪轂總成之一內部帶螺紋部分嚙合的一外部帶螺紋部分，且 該突出部分經構形以鄰接該至少一個鏈輪。Such as the bicycle rear sprocket assembly of claim 21, which further includes A locking member configured to prevent an axial movement of the at least one sprocket mounted on a bicycle hub assembly with respect to a central axis of rotation of the bicycle rear sprocket assembly, wherein The locking member includes: A tubular body part having a central axis; and A protruding portion extending radially outward from the tubular body portion with respect to the central axis of the tubular body portion, The tubular body portion has an outer threaded portion configured to engage with an inner threaded portion of the bicycle hub assembly, and The protrusion is configured to abut the at least one sprocket. 如請求項35之自行車後鏈輪總成，其中 該管狀主體部分具有等於或小於26 mm之一第一外徑。Such as the bicycle rear sprocket assembly of claim 35, where The tubular body portion has a first outer diameter equal to or smaller than 26 mm. 如請求項36之自行車後鏈輪總成，其中 該第一外徑等於或大於25 mm。Such as the bicycle rear sprocket assembly of claim 36, of which The first outer diameter is equal to or greater than 25 mm. 如請求項35之自行車後鏈輪總成，其中 該突出部分具有等於或小於32 mm之一第二外徑。Such as the bicycle rear sprocket assembly of claim 35, where The protruding portion has a second outer diameter equal to or smaller than 32 mm. 如請求項38之自行車後鏈輪總成，其中 該第二外徑等於或大於30 mm。Such as the bicycle rear sprocket assembly of claim 38, of which The second outer diameter is equal to or greater than 30 mm. 如請求項35之自行車後鏈輪總成，其中 該鎖定構件具有一工具嚙合部分。Such as the bicycle rear sprocket assembly of claim 35, where The locking member has a tool engaging portion. 如請求項21之自行車後鏈輪總成，其進一步包含 一鏈輪支撐件，其中 該至少一個鏈輪包括附接至該鏈輪支撐件之複數個鏈輪。Such as the bicycle rear sprocket assembly of claim 21, which further includes A sprocket support, where The at least one sprocket includes a plurality of sprockets attached to the sprocket support. 如請求項41之自行車後鏈輪總成，其中 該複數個鏈輪藉由一黏附劑附接至該鏈輪支撐件。Such as the bicycle rear sprocket assembly of claim 41, where The plurality of sprockets are attached to the sprocket support by an adhesive. 如請求項41之自行車後鏈輪總成，其中 該鏈輪支撐件由包括一樹脂材料之一非金屬材料製成。Such as the bicycle rear sprocket assembly of claim 41, where The sprocket support is made of a non-metallic material including a resin material. 如請求項21之自行車後鏈輪總成，其進一步包含 一後輪轂鄰接表面，其經構形以在該自行車後鏈輪總成安裝至一自行車輪轂總成之一狀態中在相對於該自行車後鏈輪總成之一旋轉中心軸線的一軸向方向上鄰接該自行車輪轂總成，其中 該至少一個鏈輪包括複數個鏈輪，該複數個鏈輪包括一最大鏈輪，該最大鏈輪具有一軸向內表面及在該軸向方向上設置於該軸向內表面之一反向側上的一軸向外表面，相比於該軸向內表面，該軸向外表面在該軸向方向上更接近該後輪轂鄰接表面，且 在該軸向方向上界定於該軸向內表面與該後輪轂鄰接表面之間的一軸向距離等於或大於7 mm。Such as the bicycle rear sprocket assembly of claim 21, which further includes A rear hub abutment surface configured to be in an axial direction relative to a central axis of rotation of the bicycle rear sprocket assembly in a state where the bicycle rear sprocket assembly is mounted to a bicycle hub assembly Adjacent to the bicycle hub assembly, where The at least one sprocket includes a plurality of sprocket wheels, the plurality of sprocket wheels includes a largest sprocket, the largest sprocket has an axial inner surface and a reverse of the axial inner surface in the axial direction An axial outer surface on the side, the axial outer surface is closer to the rear hub abutment surface in the axial direction than the axial inner surface, and An axial distance defined between the axial inner surface and the abutting surface of the rear hub in the axial direction is equal to or greater than 7 mm. 如請求項44之自行車後鏈輪總成，其中 該軸向距離等於或大於10 mm。Such as the bicycle rear sprocket assembly of claim 44, where The axial distance is equal to or greater than 10 mm. 一種自行車後鏈輪總成，其包含： 複數個鏈輪，其包括一最大鏈輪，該最大鏈輪具有一軸向內表面及在相對於該自行車後鏈輪總成之一旋轉中心軸線的一軸向方向上設置於該軸向內表面之一反向側上的一軸向外表面； 一後輪轂鄰接表面，其經構形以在該自行車後鏈輪總成安裝至一自行車輪轂總成之一狀態中在該軸向方向上鄰接該自行車輪轂總成，相比於該軸向內表面，該軸向外表面在該軸向方向上更接近該後輪轂鄰接表面；及 在該軸向方向上界定於該軸向內表面與該後輪轂鄰接表面之間的一軸向距離等於或大於7 mm。A bicycle rear sprocket assembly, which includes: A plurality of sprockets, including a largest sprocket having an axial inner surface and arranged in the axial direction in an axial direction relative to a rotation center axis of the bicycle rear sprocket assembly An axial outer surface on the opposite side of one of the surfaces; A rear hub abutment surface, which is configured to abut the bicycle hub assembly in the axial direction in a state where the bicycle rear sprocket assembly is mounted to a bicycle hub assembly, as compared to the axial inward Surface, the axially outer surface is closer to the rear hub abutment surface in the axial direction; and An axial distance defined between the axial inner surface and the abutting surface of the rear hub in the axial direction is equal to or greater than 7 mm. 如請求項46之自行車後鏈輪總成，其中 該軸向距離等於或大於10 mm。Such as the bicycle rear sprocket assembly of claim 46, where The axial distance is equal to or greater than 10 mm. 如請求項46之自行車後鏈輪總成，其中 在該自行車後鏈輪總成安裝至該自行車輪轂總成之一狀態中，相比於該後輪轂鄰接表面，該軸向內表面經定位成更接近該自行車輪轂總成之一軸向中心平面。Such as the bicycle rear sprocket assembly of claim 46, where In a state where the bicycle rear sprocket assembly is mounted to the bicycle hub assembly, the axial inner surface is positioned closer to an axial center plane of the bicycle hub assembly than the rear hub abutment surface . 如請求項46之自行車後鏈輪總成，其中 該複數個鏈輪之一總數目為12。Such as the bicycle rear sprocket assembly of claim 46, where The total number of one of the plurality of sprockets is 12. 如請求項46之自行車後鏈輪總成，其中 該最大鏈輪之一總齒數等於或大於39。Such as the bicycle rear sprocket assembly of claim 46, where The total number of teeth of one of the largest sprocket wheels is equal to or greater than 39. 如請求項46之自行車後鏈輪總成，其中 該最大鏈輪之一總齒數等於或大於45。Such as the bicycle rear sprocket assembly of claim 46, where The total number of teeth of one of the largest sprocket wheels is equal to or greater than 45.
TW109133511A 2017-05-30 2018-05-11 Bicycle rear sprocket assembly TWI785386B (en)

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
US15/608,915 US11059541B2 (en) 2017-05-30 2017-05-30 Bicycle hub assembly
US15/608,924 US11332213B2 (en) 2017-05-30 2017-05-30 Bicycle rear sprocket assembly and bicycle drive train
US15/608,924 2017-05-30
US15/608,915 2017-05-30
US15/673,346 2017-08-09
US15/673,346 US10377174B2 (en) 2017-08-09 2017-08-09 Bicycle hub assembly
US15/686,177 2017-08-25
US15/686,177 US11179967B2 (en) 2017-05-30 2017-08-25 Bicycle hub assembly
US15/686,179 2017-08-25
US15/686,179 US11220309B2 (en) 2017-05-30 2017-08-25 Bicycle rear sprocket assembly

Publications (2)

Publication Number Publication Date
TW202118691A true TW202118691A (en) 2021-05-16
TWI785386B TWI785386B (en) 2022-12-01

Family

ID=64279055

Family Applications (5)

Application Number Title Priority Date Filing Date
TW111140632A TW202323130A (en) 2017-05-30 2018-05-11 Bicycle rear sprocket assembly
TW109133511A TWI785386B (en) 2017-05-30 2018-05-11 Bicycle rear sprocket assembly
TW107116085A TWI707801B (en) 2017-05-30 2018-05-11 Bicycle rear sprocket assembly
TW107116089A TWI700198B (en) 2017-05-30 2018-05-11 Bicycle hub assembly
TW109122289A TWI795653B (en) 2017-05-30 2018-05-11 Bicycle hub assembly

Family Applications Before (1)

Application Number Title Priority Date Filing Date
TW111140632A TW202323130A (en) 2017-05-30 2018-05-11 Bicycle rear sprocket assembly

Family Applications After (3)

Application Number Title Priority Date Filing Date
TW107116085A TWI707801B (en) 2017-05-30 2018-05-11 Bicycle rear sprocket assembly
TW107116089A TWI700198B (en) 2017-05-30 2018-05-11 Bicycle hub assembly
TW109122289A TWI795653B (en) 2017-05-30 2018-05-11 Bicycle hub assembly

Country Status (4)

Country Link
JP (2) JP6728273B2 (en)
CN (4) CN113060240B (en)
DE (6) DE102018008586A1 (en)
TW (5) TW202323130A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108974233B (en) * 2017-05-30 2021-01-05 株式会社岛野 Bicycle rear sprocket assembly and bicycle drive train
TWI821507B (en) * 2019-01-29 2023-11-11 義大利商坎帕克諾羅公司 Cogset with increasing jump
US11465710B2 (en) * 2019-12-10 2022-10-11 Shimano Inc. Bicycle rear sprocket assembly
USD951818S1 (en) 2021-01-12 2022-05-17 The Cycle Group Cassette
DE102022129554A1 (en) * 2022-11-08 2024-05-08 Dt Swiss Ag Hub especially for bicycles

Family Cites Families (63)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2382740A (en) * 1943-07-10 1945-08-14 Fred P Noffsinger Sprocket wheel
GB1482075A (en) * 1973-08-22 1977-08-03 Raleigh Industries Ltd Change speed gears for pedally propelled vehicles
JPS6111116Y2 (en) * 1981-03-20 1986-04-08
US4519791A (en) * 1982-09-03 1985-05-28 Shimano Industrial Company Limited Sprocket for a bicycle
CN87209772U (en) * 1987-06-29 1988-04-06 陈纪枫 Automatic 16 grades speed variator of bicycle
JPH0187993U (en) * 1987-12-02 1989-06-09
GB9203247D0 (en) * 1992-02-15 1992-04-01 James Kenneth W Improvements in and relating to hub assemblies
ES2067389B1 (en) * 1993-02-23 1998-03-01 Navas Antonio Guerra HUB FOR BICYCLE WHEELS.
DE19543436C2 (en) * 1995-11-22 2000-10-12 Fag Automobiltechnik Ag Wheel bearings
US5954604A (en) * 1996-11-21 1999-09-21 Shimano, Inc. Multiple sprocket assembly for a bicycle
US6264575B1 (en) * 1999-04-08 2001-07-24 Shimano, Inc. Freewheel for a bicycle
JP4474774B2 (en) * 2000-05-31 2010-06-09 日本精工株式会社 Wheel drive unit
US6382381B1 (en) * 2000-09-06 2002-05-07 Shimano Inc. Bicycle hub assembly
US6523659B2 (en) * 2000-12-11 2003-02-25 Shimano Inc. Bicycle hub with tight connection ratchet and detachable freewheel
US20020139631A1 (en) * 2001-03-30 2002-10-03 Wang Ming Theng Frictionless rear hub sprocket and ratchet assembly
CN1400134A (en) * 2001-08-01 2003-03-05 王毓丹 Flywheel front-mounted speed variable bicycle drive device
US7011592B2 (en) * 2002-03-08 2006-03-14 Shimano, Inc. Sprocket assembly for a bicycle
CN1461709A (en) * 2002-05-30 2003-12-17 刘文川 Hub of bicycle
US7101296B1 (en) * 2002-07-24 2006-09-05 Sonnax Industries, Inc. Synchronous rear belt drive system for motorcycles and method of use
US6923741B2 (en) * 2002-08-30 2005-08-02 Shimano Inc. Top sprocket for a rear sprocket assembly and rear sprocket assembly for a bicycle
US6866604B2 (en) * 2003-01-17 2005-03-15 Shimano, Inc. Multiple level sprocket support for a bicycle
US7044876B2 (en) * 2003-01-17 2006-05-16 Shimano, Inc. Bicycle sprocket having lateral protrusions for use in a multiple sprocket assembly
US7846047B2 (en) * 2004-09-10 2010-12-07 Shimano, Inc. Bicycle sprocket having a thickened spline
US8096908B2 (en) * 2004-12-14 2012-01-17 Shimano, Inc. Bicycle sprocket with a laterally projecting gear change tooth
US7585240B2 (en) * 2005-02-03 2009-09-08 Shimano Inc. Bicycle sprocket assembly
US7435197B2 (en) * 2005-05-11 2008-10-14 Shimano Inc. Rear sprocket for bicycle transmission
US20080004143A1 (en) * 2006-06-16 2008-01-03 Shimano Inc. Bicycle sprocket assembly
JP4191757B2 (en) * 2006-10-12 2008-12-03 株式会社シマノ Bicycle shift control device
EP2119929B1 (en) * 2007-01-17 2016-08-17 NTN Corporation Constant velocity universal joint
JP5349756B2 (en) * 2007-01-17 2013-11-20 Ｎｔｎ株式会社 Constant velocity universal joint
JP2008189254A (en) * 2007-02-07 2008-08-21 Shimano Inc Rear sprocket assembly for bicycle, and sprocket
ITMI20071658A1 (en) * 2007-08-09 2009-02-10 Campagnolo Srl PINION MODULE FOR A BICYCLE AND SPROCKET PACK INCLUDING THIS MODULE
ITMI20071661A1 (en) * 2007-08-09 2009-02-10 Campagnolo Srl ASSEEME OF WHEELS TOOTHED FOR A BICYCLE
US7871347B2 (en) * 2007-10-11 2011-01-18 Shimano Inc. Bicycle rear sprocket assembly
ITBO20070725A1 (en) * 2007-10-30 2009-04-30 O F F Road Di Cerasi Alessandr CONNECTION FLANGE FOR CYCLES AND MOTORCYCLES TRANSMISSION BODIES
CN201231847Y (en) * 2008-06-19 2009-05-06 魏代友 Gear driving bicycle
DE102009010258B4 (en) * 2009-02-24 2015-07-30 Carbofibretec Gmbh Bicycle hub assembly with a hollow axle made of fiber composite material
KR101076150B1 (en) * 2009-02-26 2011-10-21 현대위아 주식회사 Spline shaft joint
TWM362767U (en) * 2009-03-16 2009-08-11 Joy Ind Co Ltd Structure of sleeve for wheel hub of bicycle
US20100260544A1 (en) * 2009-04-09 2010-10-14 Pi-Yun Chiang Combination of Bicycle Rear Wheel Hub and Sprocket Set
TW201215537A (en) * 2010-10-07 2012-04-16 Chosen Co Ltd Sprocket base structure of bike rear hub
US8696503B2 (en) * 2011-03-01 2014-04-15 Shimano Inc. Bicycle sprocket assembly
TW201311477A (en) * 2011-09-09 2013-03-16 Kunshan Henry Metal Tech Co Two-sided displacement hub ratchet structure
TWM420444U (en) * 2011-09-13 2012-01-11 Kunshan Henry Metal Tech Co Hub ratchet structure having double-sided displacement
CN103244570B (en) * 2012-02-06 2017-10-17 博世汽车部件(长沙)有限公司 Vehicle starter and its spline device
US8979387B2 (en) * 2012-09-11 2015-03-17 Shimano Inc. Bicycle hub assembly
CN203078584U (en) * 2013-02-17 2013-07-24 荆州恒隆汽车零部件制造有限公司 Connecting structure for gear shaft and torsion bar of automobile steering device
US9829085B2 (en) * 2013-05-07 2017-11-28 Shimano Inc. Bicycle sprocket
NL2010969C2 (en) * 2013-06-14 2014-12-17 Robertus Cornelius Wilhelmus Hoek CHAIN WHEEL CARRIER FOR AN ACCELERATION SYSTEM OF A BIKE.
TWM466030U (en) * 2013-07-19 2013-11-21 Tokenproducts Inc Ratchet base
US9199509B2 (en) * 2014-01-21 2015-12-01 Shimano Inc. Bicycle hub
US9415835B2 (en) * 2014-01-24 2016-08-16 Shimano Inc. Rotatable annular bicycle component and bicycle rear sprocket
NL2012339A (en) * 2014-02-28 2015-10-14 Dti Advanced Tech B V Rear axle and rear wheel and bicycle frame for a bicycle
US9334910B2 (en) * 2014-05-28 2016-05-10 Shimano Inc. Lock member for fixedly locking a disc brake rotor on a bicycle hub
US10155567B2 (en) * 2014-10-07 2018-12-18 Shimano Inc. Bicycle shifting control apparatus
CN105680619A (en) * 2014-11-19 2016-06-15 罗伯特·博世有限公司 Motor assembly and vehicle starter
EP3037336B1 (en) * 2014-12-23 2017-04-12 Campagnolo S.R.L. Sprocket assembly for a bicycle
US9649880B2 (en) * 2015-01-29 2017-05-16 Shimano Inc. Bicycle hub assembly
US9168976B1 (en) * 2015-03-17 2015-10-27 Praxis Works LLC Cassette and bicycle wheel assembly
DE102015205736B4 (en) * 2015-03-30 2024-05-16 Sram Deutschland Gmbh Bicycle rear wheel sprocket arrangement
US9511819B1 (en) * 2015-05-25 2016-12-06 Shimano Inc. Bicycle rear sprocket assembly
CN205044904U (en) * 2015-09-30 2016-02-24 株式会社岛野 A locking component for bicycle part
US9707801B2 (en) * 2015-10-01 2017-07-18 Shimano Inc. Bicycle hub assembly

Also Published As

Publication number Publication date
CN111469972A (en) 2020-07-31
TW201900493A (en) 2019-01-01
JP6728273B2 (en) 2020-07-22
JP2018203240A (en) 2018-12-27
CN111469972B (en) 2023-02-17
TWI700198B (en) 2020-08-01
TWI795653B (en) 2023-03-11
TW202118652A (en) 2021-05-16
DE102018008586A1 (en) 2018-12-27
CN113060240A (en) 2021-07-02
CN108974235B (en) 2021-03-09
TW201900447A (en) 2019-01-01
JP2018203238A (en) 2018-12-27
DE102018008581A1 (en) 2018-12-20
CN113060240B (en) 2022-08-19
DE102018111278A1 (en) 2018-12-06
DE102018111282A1 (en) 2018-12-06
CN108974235A (en) 2018-12-11
DE202018106137U1 (en) 2018-11-08
CN108973521A (en) 2018-12-11
TWI785386B (en) 2022-12-01
JP6642934B2 (en) 2020-02-12
TW202323130A (en) 2023-06-16
DE202018106138U1 (en) 2018-11-08
TWI707801B (en) 2020-10-21
CN108973521B (en) 2021-10-08

Similar Documents

Publication Publication Date Title
TWI707801B (en) Bicycle rear sprocket assembly
TWI765107B (en) Bicycle rear sprocket assembly
TWI785388B (en) Bicycle rear sprocket assembly and bicycle drive train
TWI707802B (en) Bicycle rear sprocket assembly and bicycle drive train
TWI752255B (en) Bicycle rear sprocket adapter
TWI700197B (en) Bicycle hub assembly
TW202423723A (en) Bicycle rear hub assembly and sprocket support body