JPH03186406A - Pneumatic radial tire - Google Patents

Pneumatic radial tire

Info

Publication number
JPH03186406A
JPH03186406A JP1322628A JP32262889A JPH03186406A JP H03186406 A JPH03186406 A JP H03186406A JP 1322628 A JP1322628 A JP 1322628A JP 32262889 A JP32262889 A JP 32262889A JP H03186406 A JPH03186406 A JP H03186406A
Authority
JP
Japan
Prior art keywords
block
tread
tire
lug groove
cord
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP1322628A
Other languages
Japanese (ja)
Inventor
Michio Shimizu
倫生 清水
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yokohama Rubber Co Ltd
Original Assignee
Yokohama Rubber Co Ltd
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
Application filed by Yokohama Rubber Co Ltd filed Critical Yokohama Rubber Co Ltd
Priority to JP1322628A priority Critical patent/JPH03186406A/en
Publication of JPH03186406A publication Critical patent/JPH03186406A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03Tread patterns
    • B60C11/13Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
    • B60C11/1376Three dimensional block surfaces departing from the enveloping tread contour
    • B60C11/1384Three dimensional block surfaces departing from the enveloping tread contour with chamfered block corners
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03Tread patterns
    • B60C11/13Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
    • B60C11/1376Three dimensional block surfaces departing from the enveloping tread contour
    • B60C11/1392Three dimensional block surfaces departing from the enveloping tread contour with chamfered block edges

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

PURPOSE:To prevent a vehicle from its side drift, even when the direction of a cord of an outer side belt reinforced layer is tilted in a direction opposite to the direction of lug grooves for partitioning blocks, by applying stepped chamfering to an edge on at least a tread-in side of the block. CONSTITUTION:Blocks 2 are formed on the surface of a tread 1 and partitioned by main grooves 3 along a tire peripheral direction E-E' and lug grooves 4 tilted at a predetermined angle theta in relation to the tire peripheral direction. A belt reinforced layer 5 is arranged inside the tread 1 and the cord 52 of an outer side belt layer 5b is tilted on the side opposite to the lug groove 4 in relation to the tire peripheral direction. Here stepped chamfering 21 is applied to front and rear edges in the tire peripheral direction of the block 2. The chamfering 21 is formed of a tilt surface part 21a, for which a tilt angle alpha1 in relation to the radial direction is larger than a tilt angle alpha2 of the lug groove 4, and a plane part 21b in parallel to a block surface.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は空気入りラジアルタイヤに関し、さらに詳しく
は、ドライ路での車両流れを防止すると共に、スノー路
でのエツジ効果を有するブロック基調パターンを有する
空気入りラジアルタイヤに関する。
[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a pneumatic radial tire, and more particularly, the present invention relates to a pneumatic radial tire that has a block pattern that prevents vehicle flow on dry roads and has an edge effect on snowy roads. Regarding pneumatic radial tires.

〔従来技術〕[Prior art]

一般に空気入りラジアルタイヤは、トレッドにおける最
外ベルト補強層のコードの傾斜方向が、道路のカント(
水掃けのため道路中央部を路肩部よりも高くしであるこ
と)によって起こる直進時の車両流れを防止するため、
道路中央側に横力を発生するような配置になっている。
In general, in pneumatic radial tires, the direction of inclination of the cords of the outermost belt reinforcing layer in the tread is determined by the cant of the road (
In order to prevent the flow of vehicles when going straight, which occurs due to the fact that the center of the road is raised higher than the shoulder to sweep water,
The arrangement is such that lateral force is generated toward the center of the road.

すなわち、第4図は、これを具体的に説明する略図であ
って、左側通行に法規制された我が国で販売されるラジ
アルタイヤのベルト層の場合を、道路側から見上げた状
態で示している。
That is, Fig. 4 is a schematic diagram specifically explaining this, and shows the case of the belt layer of a radial tire sold in Japan, where left-hand driving is legally regulated, as viewed from the road side. .

破線の51は内側ベルト層のコード、実線の52は外側
ベルト層のコード、Rはタイヤの回転方向である。外側
ベルト層(最外ベルト補強層)のコード52は、回転方
向Rに対しタイヤ周方向に対し図のように傾斜し、この
ベルト層に基づくトラクションのラジアル方向成分反力
(横力F、)を道路中央側に向けるようにしている。こ
れによって路肩方へ車両流れが起こらないようにしてい
るのである。右側通行国で販売されるラジアルタイヤで
は、上記とは反対方向の1頃斜になっている。
The broken line 51 is the code of the inner belt layer, the solid line 52 is the code of the outer belt layer, and R is the rotation direction of the tire. The cords 52 of the outer belt layer (outermost belt reinforcing layer) are inclined with respect to the tire circumferential direction with respect to the rotational direction R as shown in the figure, and the radial direction component reaction force of traction based on this belt layer (lateral force F,) so that it faces toward the center of the road. This prevents vehicles from flowing toward the shoulder of the road. Radial tires sold in countries that drive on the right side are slanted around 1 in the opposite direction to the above.

ところが、このような補強ベルト層をもつラジアルタイ
ヤに対し、トレッドにブロック基調のパターンを設け、
しかも第5図に示すように、そのブロック2の前後を区
画するラグ溝4の方向をタイヤ周方向に対して上記最外
ベルト補強層のコード52と反対方向に傾斜するように
しているときは、このブロック2がエツジを路面に係合
させることによって発生するトラクションのラジアル方
向成分反力(横力F、)が、上記最外ベルト補強層によ
って発生する横力F、とは逆方向になってしまう。この
ため、このような場合には車両の横流れを起こしやすく
なるという問題があった。
However, for radial tires with such a reinforcing belt layer, the tread has a block-based pattern,
Moreover, as shown in FIG. 5, when the direction of the lug groove 4 that partitions the front and rear of the block 2 is inclined in the direction opposite to the cord 52 of the outermost belt reinforcing layer with respect to the tire circumferential direction, , the radial component reaction force (lateral force F) of traction generated by this block 2 engaging the edge with the road surface is in the opposite direction to the lateral force F generated by the outermost belt reinforcing layer. It ends up. Therefore, in such a case, there is a problem in that the vehicle tends to drift sideways.

このような車両の横流れを防止する手段として、ブロッ
ク2のエツジを面取りする方法が考えられる。しかしな
がら、このようにエツジを面取りすると、スノー路での
エツジ効果が低減してスノー性能を低下するため、オー
ルシーズンタイヤとして使用できなくなるという問題が
発生する。
A method of chamfering the edges of the block 2 may be considered as a means to prevent such a sideways flow of the vehicle. However, when the edges are chamfered in this way, the edge effect on snowy roads is reduced and snow performance is degraded, resulting in a problem that the tire cannot be used as an all-season tire.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

本発明の目的は、上述したように最外ベルト補強層のコ
ード方向とブロックを区画するラグ溝方向とをタイヤ周
方向に対して互いに反対方向に傾斜させる場合であって
も、ドライ路での車両の横流れを起こさないようにする
と共に、スノー路でのエツジ効果も発揮できるようにし
た空気入りラジアルタイヤを提供することにある。
As described above, an object of the present invention is to improve the performance on dry roads even when the cord direction of the outermost belt reinforcing layer and the direction of the lug grooves that partition the blocks are inclined in opposite directions with respect to the tire circumferential direction. To provide a pneumatic radial tire that prevents a vehicle from drifting sideways and also exhibits an edge effect on snowy roads.

(課題を解決するための手段〕 上記目的を遠戚する本発明は、トレッド面にブロック基
調のパターンを設け、ブロックを区画するラグ溝の方向
が、トレッドに配置した最外ベルト補強層のコード方向
とタイヤ周方向に対し互いに反対側に傾斜している空気
入りラジアルタイヤにおいて、前記ブロックの少なくと
も踏込み側のエツジを段付き状の面取り(21)で欠除
するようにしたものである。さらに具体的には、この段
付き状の面取り(21〉を、ブロック表面側に連なると
共に半径方向に対しラグ溝壁面よりも大きな傾斜角をも
つ傾斜面部(21a)又は凸曲面部と、ラグ溝壁面側に
連なると共にブロック表面と実質的に平行な平面部(2
1b)とから形成するようにしたものである。
(Means for Solving the Problems) The present invention, which is distantly related to the above object, provides a block-based pattern on the tread surface, and the direction of the lug grooves that partition the blocks is the same as the cord of the outermost belt reinforcing layer arranged on the tread. In the pneumatic radial tire that is inclined in opposite directions with respect to the direction and the circumferential direction of the tire, at least the edge on the stepping side of the block is removed with a stepped chamfer (21). Specifically, this stepped chamfer (21) is connected to an inclined surface portion (21a) or a convex curved surface portion that is continuous to the block surface side and has a larger inclination angle than the lug groove wall surface in the radial direction, and a lug groove wall surface. A plane part (2
1b).

このようにブロックのエツジを面取りしたことによって
横力の発生が抑制され、車両の横流れを起こさなくする
ことができる。また、面取りが段付き状であることによ
って、下段側にエツジを形成し、これによってスノー路
でのエツジ効果を維持し、スノー性能を発揮させるよう
にするものである。
By chamfering the edges of the blocks in this way, the generation of lateral force is suppressed, and lateral drift of the vehicle can be prevented. Further, by having a stepped chamfer, an edge is formed on the lower side, thereby maintaining an edge effect on snowy roads and exhibiting snow performance.

第1図は本発明の空気入りラジアルタイヤの代表例のト
レッド部を示している。
FIG. 1 shows the tread portion of a typical example of the pneumatic radial tire of the present invention.

トレッド1の表面には多数のブロック2からなるブロッ
クパターンが形成されている。ブロック2は、タイヤ周
方向E−E’方向に沿う複数本の主溝3と、タイヤ周方
向E−E’に対し角度θをなして傾斜する多数のラグ溝
4とに区画されることにより形成されている。
A block pattern consisting of a large number of blocks 2 is formed on the surface of the tread 1. The block 2 is divided into a plurality of main grooves 3 along the tire circumferential direction E-E' and a large number of lug grooves 4 inclined at an angle θ with respect to the tire circumferential direction E-E'. It is formed.

トレッド1の内部にはベルト補強層5が設けられている
。このベルト補強層5は、例えばスチールコード、アラ
ミドコードなどの高強度。
A belt reinforcing layer 5 is provided inside the tread 1. This belt reinforcing layer 5 is made of high strength steel cord, aramid cord, etc., for example.

高弾性率のコードからなり、内側ベルト層5aと外側ベ
ルト層5bとの2層から構成されている。もちろん、2
N以上設けてあってもよい。
It is made of a cord with a high elastic modulus, and is composed of two layers: an inner belt layer 5a and an outer belt layer 5b. Of course, 2
N or more may be provided.

両ベルト層5a、5bはそれぞれコード51,52を互
いに交差させ、外側ベルト層5bのコード52が、タイ
ヤ周方向E−E’に対してラグ溝4とは互いに反対方向
に傾斜している。
The cords 51 and 52 of both belt layers 5a and 5b cross each other, and the cords 52 of the outer belt layer 5b are inclined in directions opposite to the lug grooves 4 with respect to the tire circumferential direction E-E'.

また、多数のブロック2は、いずれもタイヤ周方向E−
E’の前後のエツジが、第2図に示すように段付き状に
面取り2工されている。この段付き状の面取り21は傾
斜面部21aと平面部21bとから形成されている。傾
斜面部21aは、半径方向に対する傾斜角α1がラグ溝
4の傾斜角α2よりも大きくしてブロック表面側に連な
るようにしである。これに対し平面部21bは、ブロッ
ク表面と実質的に平行な面で、かつラグ溝4の壁面側に
連なるようにしである。
Further, the large number of blocks 2 are all arranged in the tire circumferential direction E-
The front and rear edges of E' are chamfered twice in a stepped manner, as shown in Figure 2. This stepped chamfer 21 is formed from an inclined surface portion 21a and a flat surface portion 21b. The inclined surface portion 21a has an inclination angle α1 with respect to the radial direction larger than an inclination angle α2 of the lug groove 4, so that it continues to the block surface side. On the other hand, the flat portion 21b is a surface substantially parallel to the block surface and continuous with the wall surface side of the lug groove 4.

このようにエツジが段付き状に面取りされたことにより
、ブロック2のトレッド面側は、傾斜面部21aによっ
てドライ路面に対するエツジ効果が減殺されトラクショ
ンが低減する。そのため車両の横流れの原因となる横力
も抑制されることになる。このようなエツジ効果を減殺
する傾斜面部21aは、凸曲面で形成することもできる
。一方、下側の平面部21bはラグ溝壁との交差部にエ
ツジを形成しているので、スノー路に対してエツジ効果
を有し、優れたスノー性能を発揮することになる。
Since the edges are chamfered in a stepped manner in this manner, the sloped surface portion 21a of the block 2 on the tread surface side reduces the edge effect on the dry road surface, thereby reducing traction. Therefore, the lateral force that causes the vehicle to drift sideways is also suppressed. The inclined surface portion 21a that reduces such an edge effect can also be formed with a convex curved surface. On the other hand, since the lower plane portion 21b forms an edge at the intersection with the lug groove wall, it has an edge effect on the snow road and exhibits excellent snow performance.

このような作用効果をもたらす段付き状の面取り21と
しては、上記傾斜面部21aの平均幅11を少なくとも
2開以上、平面部21bの平均幅12を少なくとも1m
m以上、かつ段付き深さl、を主溝深さが811II1
1以上のものに対し少なくとも2mm以上になるように
することが好ましい。
As for the stepped chamfer 21 that brings about such an effect, the average width 11 of the slope portion 21a is at least 2 mm or more, and the average width 12 of the flat portion 21b is at least 1 m.
m or more, and the stepped depth is l, the main groove depth is 811II1
It is preferable that the distance be at least 2 mm or more for one or more objects.

また、第1図に示す実施態様では、上記段付き状の面取
り21はタイヤ周方向E−E’ の前後両エツジに施さ
れているが、タイヤ回転方向が指定された方向性パター
ンの場合には、少なくともその踏込み側のエツジだけに
施せば十分である。
Further, in the embodiment shown in FIG. 1, the stepped chamfer 21 is provided on both the front and rear edges in the tire circumferential direction E-E', but when the tire rotation direction is a specified directional pattern, It is sufficient to apply this to at least the edge on the stepping side.

第5図に示すグラフは、第1図に示すブロックパターン
とベルト補強層とを有する本発明のラジアルタイヤと、
面取りを施さないこと以外は本発明と同一にした従来タ
イヤとについて、ラグ溝の角度θを、それぞれ90’、
75’60°、45°、30°に変化させたときに、ド
ライ路で発生する潜在コーナリングフォース(RCF)
(横力に対応する尺度)を比較したものである。この第
5図中、・印は従来タイヤの結果であり、○印は本発明
タイヤの結果である。また、BFは最外ベルト補強層が
もつ潜在コーナリングフォース(RCF)のレベルを示
している。
The graph shown in FIG. 5 shows the radial tire of the present invention having the block pattern and belt reinforcing layer shown in FIG.
Regarding the conventional tire which is the same as the present invention except that no chamfering is performed, the angle θ of the lug groove is 90' and 90', respectively.
75' Potential cornering force (RCF) generated on a dry road when changing to 60°, 45°, and 30°
(a scale corresponding to lateral force). In FIG. 5, the marks are the results for the conventional tire, and the marks ○ are the results for the tire of the present invention. Further, BF indicates the level of potential cornering force (RCF) possessed by the outermost belt reinforcing layer.

この第5図から明らかなように、本発明タイヤは、最外
ベルト補強層がもつBFから、せいぜい潜在コーナリン
グフォースRCFを0にする程度の横力しか発生してい
ない。特に、θが60°以上の場合において効果が顕著
である。
As is clear from FIG. 5, in the tire of the present invention, only a lateral force is generated from the BF of the outermost belt reinforcing layer to the extent that the potential cornering force RCF is reduced to zero at most. In particular, the effect is remarkable when θ is 60° or more.

このθが60°以上の場合には、従来タイヤでは車両の
横流れが発生するが、本発明タイヤでは、このような横
流れの発生がないことがわかる。
When this θ is 60° or more, lateral flow of the vehicle occurs in the conventional tire, but it can be seen that such lateral flow does not occur in the tire of the present invention.

〔発明の効果〕〔Effect of the invention〕

上述したように、本発明によれば、ブロックの少なくと
も踏込み側のエツジを段付き状に面取りしたので、最外
ヘルド補強層のコード方向とブロックを区画するラグ溝
方向とがタイヤ周方向に対して互いに反対方向に傾斜し
ていても、ドライ路を走行するときに車両の横流れを起
こすことはない。また、面取りが段付き状であるため、
スノー路を走行するときは、下段側の工4゜ ッジ効果により優れたスノー性能を発揮することができ
る。
As described above, according to the present invention, at least the edge on the stepping side of the block is chamfered in a stepped manner, so that the cord direction of the outermost heald reinforcing layer and the lug groove direction that partitions the block are aligned with respect to the tire circumferential direction. Even if the two wheels are tilted in opposite directions, the vehicle will not drift sideways when driving on a dry road. In addition, since the chamfer is stepped,
When driving on snowy roads, excellent snow performance can be achieved due to the 4-degree edge effect on the lower side.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明によるラジアルタイヤの代表例について
、そのトレッド部を概略的に示す平面図、第2図は第1
図の■−■矢視断面図、第3図は本発明タイヤと従来タ
イヤのθとRCFとの関係を示すグラフ、第4図はベル
ト補強層により発生する横力の説明図、第5図はブロッ
クにより発生する横力の説明図である。 1・・・トレッド、2・・・ブロック、3・・・主溝、
4・・・ラグ溝、5・・・ベルト補強層、5b・・・外
側ベルト層(最外ベルト補強層)、21・・・(段付き
状の)エツジ、21a・・・傾斜面部1.21b・・・
平面部、52・・・(最外ベルト補強層の)コード。
FIG. 1 is a plan view schematically showing the tread portion of a typical example of the radial tire according to the present invention, and FIG.
3 is a graph showing the relationship between θ and RCF of the tire of the present invention and the conventional tire. FIG. 4 is an explanatory diagram of the lateral force generated by the belt reinforcing layer. FIG. is an explanatory diagram of lateral force generated by a block. 1...Tread, 2...Block, 3...Main groove,
4...Lug groove, 5...Belt reinforcing layer, 5b...Outer belt layer (outermost belt reinforcing layer), 21...(stepped) edge, 21a...Slope portion 1. 21b...
Flat part, 52... (outermost belt reinforcing layer) cord.

Claims (1)

【特許請求の範囲】[Claims] トレッド面にブロック基調のパターンを設け、ブロック
を区画するラグ溝の方向が、トレッドに配置した最外ベ
ルト補強層のコード方向とタイヤ周方向に対し互いに反
対側に傾斜している空気入りラジアルタイヤにおいて、
前記ブロックの少なくとも踏込み側のエッジが段付き状
の面取り(21)で欠除され、かつ該段付き状の面取り
(21)が、ブロック表面側に連なると共に半径方向に
対しラグ溝壁面よりも大きな傾斜角をもつ傾斜面部(2
1a)又は凸曲面部と、ラグ溝壁面側に連なると共にブ
ロック表面と実質的に平行な平面部(21b)とから形
成されている空気入りラジアルタイヤ。
A pneumatic radial tire that has a block-based pattern on the tread surface, and the direction of the lug grooves that separate the blocks are inclined in opposite directions with respect to the cord direction of the outermost belt reinforcing layer arranged on the tread and the tire circumferential direction. In,
At least the edge on the stepping side of the block is removed with a stepped chamfer (21), and the stepped chamfer (21) is continuous on the block surface side and is larger in the radial direction than the lug groove wall surface. Slanted surface part with an inclination angle (2
1a) or a pneumatic radial tire formed from a convex curved surface portion and a flat portion (21b) that is continuous with the lug groove wall surface and is substantially parallel to the block surface.
JP1322628A 1989-12-14 1989-12-14 Pneumatic radial tire Pending JPH03186406A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1322628A JPH03186406A (en) 1989-12-14 1989-12-14 Pneumatic radial tire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1322628A JPH03186406A (en) 1989-12-14 1989-12-14 Pneumatic radial tire

Publications (1)

Publication Number Publication Date
JPH03186406A true JPH03186406A (en) 1991-08-14

Family

ID=18145837

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1322628A Pending JPH03186406A (en) 1989-12-14 1989-12-14 Pneumatic radial tire

Country Status (1)

Country Link
JP (1) JPH03186406A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006035666A1 (en) * 2004-09-27 2006-04-06 Bridgestone Corporation Pneumatic tire
US20120267021A1 (en) * 2009-11-23 2012-10-25 CGEM and MRT, S.A. Corporation Tire with a lateral groove having a chamfer for improved snow performance
US8365783B2 (en) * 2006-11-30 2013-02-05 Pirelli Tyre S.P.A. Tire tread comprising blocks with stepped sidewalls
WO2014038689A1 (en) * 2012-09-07 2014-03-13 コンパニー ゼネラール デ エタブリッスマン ミシュラン Pneumatic tire tread and pneumatic tire with said tread
JP2014531365A (en) * 2011-09-29 2014-11-27 コンパニー ゼネラール デ エタブリッスマン ミシュラン Tread tires with improved snow and dry traction
JP2015024818A (en) * 2014-10-01 2015-02-05 コンパニー ゼネラール デ エタブリッスマン ミシュラン Tire including side groove having on-snow performance-improving chamfer part
US20180290497A1 (en) * 2017-04-11 2018-10-11 Super ATV, LLC Vehicle tire
US11472232B2 (en) * 2019-12-18 2022-10-18 The Goodyear Tire & Rubber Company Tire with tread elements including dual angled chamfer

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006035666A1 (en) * 2004-09-27 2006-04-06 Bridgestone Corporation Pneumatic tire
US8365783B2 (en) * 2006-11-30 2013-02-05 Pirelli Tyre S.P.A. Tire tread comprising blocks with stepped sidewalls
US20120267021A1 (en) * 2009-11-23 2012-10-25 CGEM and MRT, S.A. Corporation Tire with a lateral groove having a chamfer for improved snow performance
JP2013511438A (en) * 2009-11-23 2013-04-04 コンパニー ゼネラール デ エタブリッスマン ミシュラン Tire with side grooves with chamfers for improving performance on snow
JP2014531365A (en) * 2011-09-29 2014-11-27 コンパニー ゼネラール デ エタブリッスマン ミシュラン Tread tires with improved snow and dry traction
WO2014038689A1 (en) * 2012-09-07 2014-03-13 コンパニー ゼネラール デ エタブリッスマン ミシュラン Pneumatic tire tread and pneumatic tire with said tread
JPWO2014038689A1 (en) * 2012-09-07 2016-08-12 カンパニー ジェネラレ デ エスタブリシュメンツ ミシュラン Pneumatic tire tread and pneumatic tire having the tread
JP2015024818A (en) * 2014-10-01 2015-02-05 コンパニー ゼネラール デ エタブリッスマン ミシュラン Tire including side groove having on-snow performance-improving chamfer part
US20180290497A1 (en) * 2017-04-11 2018-10-11 Super ATV, LLC Vehicle tire
US11472232B2 (en) * 2019-12-18 2022-10-18 The Goodyear Tire & Rubber Company Tire with tread elements including dual angled chamfer

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