JPH10226205A - Pneumatic tire for motorcycle - Google Patents

Pneumatic tire for motorcycle

Info

Publication number
JPH10226205A
JPH10226205A JP9031897A JP3189797A JPH10226205A JP H10226205 A JPH10226205 A JP H10226205A JP 9031897 A JP9031897 A JP 9031897A JP 3189797 A JP3189797 A JP 3189797A JP H10226205 A JPH10226205 A JP H10226205A
Authority
JP
Japan
Prior art keywords
tire
rigidity
side wall
motorcycle
fattress
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.)
Granted
Application number
JP9031897A
Other languages
Japanese (ja)
Other versions
JP3748651B2 (en
Inventor
Takashi Otsuka
隆 大塚
Eiko Nakagawa
英光 中川
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.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
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 Bridgestone Corp filed Critical Bridgestone Corp
Priority to JP03189797A priority Critical patent/JP3748651B2/en
Publication of JPH10226205A publication Critical patent/JPH10226205A/en
Application granted granted Critical
Publication of JP3748651B2 publication Critical patent/JP3748651B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
    • B60C13/003—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof characterised by sidewall curvature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C2200/00—Tyres specially adapted for particular applications
    • B60C2200/10—Tyres specially adapted for particular applications for motorcycles, scooters or the like

Landscapes

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

Abstract

PROBLEM TO BE SOLVED: To improve stability and riding comfortableness during cornering without losing stability at the time of straight advancing by forming a ridge line for forming an outward projecting part in a connecting point of a tire fattress part and a side wall part. SOLUTION: A fattress part 5 directly below the end of a tread part 4 has a recessed outer surface, and a ridge line 6 for forming an outward projecting part is provided in a connecting point of the recessed outer surface and outer surface 3 of a side wall part. Thus, by clearly separating the curved surface of the fattress part 5 from the curved surface of the side wall part 3, rigidity is reduced during cornering without reducing the rigidity of a tire at the time of straight advancing. Also, the curvature radius RB of a fattress recessed region is set in the range of 20 to 45% of the curvature radius Rsh of a tread shoulder part. If this value is lower than 20%, the rigidity of the tire is excessively reduced causing the deterioration of straight advance traveling performance and thus so-called drifting occurs. On the other hand, if the value exceeds 45%, rigidity at the time of straight advancing is excessively increased.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、自動二輪車用空気
入りタイヤに関し、詳しくは、直進時の安定性を損なう
ことなくコーナリング時における安定性と乗り心地性能
とを向上させた自動二輪用空気入りタイヤに関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic tire for a motorcycle, and more particularly to a pneumatic motorcycle for a motorcycle having improved cornering stability and ride comfort without impairing stability in straight running. It is about tires.

【０００２】[0002]

【従来の技術】左右一対のビード部と、該ビード部に連
なる左右一対のサイドウォール部と、該サイドウォール
部間に配置されたトレッド部とを備えた従来の自動二輪
車用空気入りタイヤにおいては、一般に、前記サイドウ
ォール部がバットレス部を含め連続する曲面で形成され
ていた。2. Description of the Related Art A conventional pneumatic motorcycle tire includes a pair of left and right bead portions, a pair of left and right side wall portions connected to the bead portion, and a tread portion disposed between the side wall portions. Generally, the sidewall portion is formed of a continuous curved surface including the buttress portion.

【０００３】[0003]

【発明が解決しようとする課題】従来の自動二輪車用空
気入りタイヤにおいては、コーナリング時の安定性の向
上を目指すとき、一般的にタイヤの剛性を下げることが
望ましいとされてきた。しかし、従来の既知手法でタイ
ヤの剛性を下げた場合、タイヤ全体の剛性が下がってし
まい、目的とするコーナリング時、特に大キャンバー時
には最適な剛性が得られても、直進時には剛性不足から
安定性の悪化を招いていた。In conventional pneumatic tires for motorcycles, it has been generally considered desirable to reduce the rigidity of the tire when aiming at improving stability during cornering. However, when the rigidity of the tire is reduced by the conventional known method, the rigidity of the entire tire is reduced, and the optimal rigidity is obtained at the time of a target cornering, particularly at a large camber, but the stability is insufficient due to insufficient rigidity at a straight running. Had worsened.

【０００４】そこで本発明の目的は、直進時のタイヤ剛
性を下げることなくコーナリング時の剛性を適正にコン
トロールし、直進時の安定性を損なうことなくコーナリ
ング時における安定性と乗り心地性能とを向上させた自
動二輪用空気入りタイヤを提供することにある。Accordingly, an object of the present invention is to appropriately control the rigidity at the time of cornering without lowering the rigidity of the tire at the time of straight traveling, and to improve the stability at the time of cornering and the riding comfort without impairing the stability at the time of straight traveling. Another object of the present invention is to provide a motorcycle pneumatic tire.

【０００５】[0005]

【課題を解決するための手段】本発明者らは、上記課題
を解決すべくコーナリング時のタイヤ変形に注目して鋭
意検討した結果、タイヤバットレス部の曲面とサイドウ
ォール部の曲面とを明確に分離し、その連結点に、外向
きに凸部を形成する稜線を形成せしめることにより、直
進時のタイヤ剛性を低下させることなく、コーナリング
時（キャンバー走行時）の剛性を下げることができるこ
とを見出し、本発明を完成するに至った。Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors have conducted intensive studies focusing on the deformation of the tire at the time of cornering. As a result, the curved surface of the tire buttress portion and the curved surface of the sidewall portion are clearly defined. It has been found that by separating and forming a ridgeline forming a convex portion outward at the connection point, the rigidity during cornering (during camber running) can be reduced without decreasing the tire rigidity when traveling straight. Thus, the present invention has been completed.

【０００６】即ち、本発明の自動二輪車用空気入りタイ
ヤは、左右一対のビード部と、該ビード部に連なる左右
一対のサイドウォール部と、該サイドウォール部間に配
置されたトレッド部とを備えた自動二輪車用空気入りタ
イヤにおいて、前記トレッド部端直下のバットレス部が
凹み外表面を有し、該凹み外表面と、前記サイドウォー
ル部の外表面との連結点に、外向きに凸部を形成する稜
線が形成されていることを特徴とするものである。That is, the motorcycle pneumatic tire of the present invention includes a pair of left and right bead portions, a pair of left and right side wall portions connected to the bead portion, and a tread portion disposed between the side wall portions. In the motorcycle pneumatic tire, the buttress portion immediately below the end of the tread portion has a concave outer surface, and a connection point between the concave outer surface and the outer surface of the sidewall portion has an outwardly convex portion. A ridge line to be formed is formed.

【０００７】前記サイドウォール部の外表面は、実質的
に平坦な表面を形成しているか、あるいは内向きに湾曲
面を形成していてもよい。The outer surface of the sidewall portion may form a substantially flat surface, or may form an inwardly curved surface.

【０００８】また、前記バットレスの凹み領域は、その
曲率半径ＲＢが前記トレッドショルダー部の曲率半径Ｒ
Ｓｈの２０〜４５％の範囲内にあることが好ましく、ま
たタイヤベースラインから、前記稜線までの高さｈ１が
前記サイドウォール部の高さｈ０の６０〜７０％の範囲
内にあることが好ましい。Further, recessed area of the buttress, the curvature radius R of the curvature radius R B is the tread shoulder portion
Is preferably in the range 20-45% of the sh, also from the tire baseline, the height h 1 to the ridge is in the range 60-70% of the height h 0 of the side wall portions Is preferred.

【０００９】[0009]

【発明の実施の形態】本発明を図面を参照して具体的に
説明する。図１に示すように、左右一対のビード部２
と、該ビード部２に連なる左右一対のサイドウォール部
３と、該サイドウォール部３間に配置されたトレッド部
４とを備えた本発明の自動二輪車用空気入りタイヤ１
は、トレッド部４端直下のバットレス部５が凹み外表面
を有し、該凹み外表面とサイドウォール部の外表面３と
の連結点に、外向きに凸部を形成する稜線６が形成され
ている。このように、バットレス部５の曲面とサイドウ
ォール部３の曲面とを明確に分離することにより、直進
時のタイヤ剛性を低下させることなく、コーナリング時
（キャンバー走行時）の剛性を下げることが可能となっ
た。なお、従来の自動二輪車用空気入りタイヤにおいて
は、図１において破線で示すようにタイヤバットレス部
５の曲面とサイドウォール部３の曲面とで明瞭な稜線を
有しているものはなかった。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described with reference to the drawings. As shown in FIG.
A pneumatic tire 1 for a motorcycle according to the present invention, comprising: a pair of left and right sidewall portions 3 connected to the bead portion 2; and a tread portion 4 disposed between the sidewall portions 3.
The buttress portion 5 immediately below the end of the tread portion 4 has a concave outer surface, and a ridge line 6 forming an outward convex portion is formed at a connection point between the concave outer surface and the outer surface 3 of the sidewall portion. ing. In this way, by clearly separating the curved surface of the buttress portion 5 and the curved surface of the sidewall portion 3, it is possible to reduce the rigidity during cornering (during camber running) without reducing the tire rigidity when traveling straight. It became. In the conventional pneumatic tires for motorcycles, none of the curved surfaces of the tire buttress portion 5 and the sidewall portion 3 have clear ridge lines as shown by broken lines in FIG.

【００１０】本発明においては、バットレス部５が凹み
外表面を有し、該凹み外表面とサイドウォール部３の外
表面との連結点に、外向きに凸部を形成する稜線６が形
成されていれば、図２の（イ）に示すようにサイドウォ
ール部３の外表面は内向きに湾曲面を形成していてもよ
い。好ましくは、図２の（ロ）に示すように前記サイド
ウォール部３の外表面は、実質的に平坦な表面を形成す
るようにする。実質的に平坦な表面を形成する場合、付
帯効果として、サイドウォール部３の曲率半径ＲＳが無
限大に近い程文字刻印等のモールドへのポッチがし易く
なり、かつポッチの種類もＲＳの曲率に応じて増やす必
要がなくなり、共用サイズが増加して、効率的である。In the present invention, the buttress portion 5 has a concave outer surface, and a ridge line 6 forming an outward convex portion is formed at a connection point between the concave outer surface and the outer surface of the sidewall portion 3. If so, the outer surface of the sidewall portion 3 may form an inwardly curved surface as shown in FIG. Preferably, the outer surface of the sidewall portion 3 forms a substantially flat surface as shown in FIG. When a substantially flat surface is formed, as an additional effect, as the radius of curvature R S of the sidewall portion 3 becomes closer to infinity, potting on a mold such as a character stamp becomes easy to occur, and the type of the potting is R S. It is not necessary to increase the curvature according to the curvature, and the shared size increases, which is efficient.

【００１１】なお、バットレス部３の凹み外表面は、湾
曲面に限定されるものではなく、例えば図３に示すよう
に、多角形型の凹み外表面でもよい。この場合、バット
レス部の凹み外表面領域の曲率半径ＲＢは、該多角形型
の内接円に近似したときの半径として定義するものとす
る。The outer surface of the recess of the buttress portion 3 is not limited to a curved surface, but may be, for example, a polygonal outer surface as shown in FIG. In this case, the radius of curvature R B of the recessed outer surface regions of the buttress portion shall be defined as the radius when approximated to an inscribed circle of the polygon type.

【００１２】本発明の自動二輪車用空気入りタイヤにお
いては、図１に示すバットレスの凹み領域の曲率半径Ｒ
Ｂがトレッドショルダー部の曲率半径ＲＳｈの２０〜４
５％の範囲内にあることが好ましい。この値が２０％未
満であるとタイヤ剛性が低下し過ぎ、直進走行性能に劣
り、いわゆるふらつきを起こす。一方、４５％を超える
と直進時の剛性が上がり過ぎ、却って好ましくない。In the pneumatic tire for a motorcycle according to the present invention, the radius of curvature R of the recessed area of the buttress shown in FIG.
B is the radius of curvature R Sh of the tread shoulder portion 20 to 4
It is preferably within the range of 5%. If this value is less than 20%, the rigidity of the tire is too low, and the straight running performance is inferior. On the other hand, if it exceeds 45%, the rigidity during straight traveling is too high, which is rather undesirable.

【００１３】また、本発明においては、図１に示すタイ
ヤベースラインｂから稜線６までの高さｈ１が前記サイ
ドウォール部３の高さｈ０の６０〜７０％の範囲内にあ
ることが好ましい。この値が６０％未満であるとビード
背面のゲージが厚くなり、キャンバー負荷時の効果的な
剛性低下が得られず、一方７０％を超えるとハンプのゲ
ージ低下効果が得られず、やはりキャンバー負荷時の効
果的な剛性低下が得らない。[0013] In the present invention, that the height h 1 from the tire baseline b shown in FIG. 1 to ridge 6 is in the range 60-70% of the height h 0 of the sidewall portion 3 preferable. If this value is less than 60%, the gauge on the back side of the bead becomes thick, and effective rigidity reduction under camber load cannot be obtained. Effective rigidity reduction at the time cannot be obtained.

【００１４】本発明の自動二輪車用空気入りタイヤは、
トレッド部端直下のバットレス部外表面と、サイドウォ
ール部外表面との改良に係るものであり、他の部分の構
造および材質等は従来のタイヤと何等変更を要するもの
ではなく、既知の構造等を採用することができる。The pneumatic tire for a motorcycle according to the present invention comprises:
The outer surface of the buttress portion just below the end of the tread portion and the outer surface of the sidewall portion are to be improved. The structure and material of the other portions do not require any change from the conventional tire, and have a known structure. Can be adopted.

【００１５】[0015]

【実施例】次に本発明を実施例に基づき具体的に説明す
る。実施例１〜４ タイヤサイズ１１０／８０−１７、１１０／７０−１
７、１４０／７０−１７および１３０／７０−１７の各
自動二輪車用空気入りタイヤにおいて、夫々バットレス
部凹み領域の曲率半径ＲＢとトレッドショルダー部の曲
率半径ＲＳｈとの比（ＲＢ／ＲＳｈ）、およびタイヤベ
ースラインから稜線までの高さｈ１とサイドウォール部
の高さｈ０との比（ｈ１／ｈ０）として夫々下記の表１
に示す値を有するものを試作した。尚、各タイヤのサイ
ドウォール部の外表面は図１に見られるような湾曲面と
した。これら試作タイヤについて、直進時タイヤ剛性
（たてバネ）、コーナリング時タイヤ剛性（たてバネ）
および実車コーナリング時安定性について以下のように
して評価を行なった。Next, the present invention will be specifically described based on examples. Examples 1 to 4 Tire sizes 110 / 80-17, 110 / 70-1
7,140 / 70-17 and 130 / in the motorcycle pneumatic tire of 70-17, the ratio of the curvature radius R Sh radius of curvature R B and the tread shoulder portion of each buttress portion recessed region (R B / R Sh ) and the ratio (h 1 / h 0 ) of the height h 1 from the tire base line to the ridge line to the height h 0 of the sidewall portion, respectively, as shown in Table 1 below.
A prototype having the values shown in Table 1 was produced. The outer surface of the sidewall portion of each tire had a curved surface as shown in FIG. For these prototype tires, tire stiffness during straight running (vertical spring), tire stiffness during cornering (vertical spring)
And the stability at the time of cornering in the actual vehicle was evaluated as follows.

【００１６】（イ）直進時タイヤ剛性（たてバネ） タイヤに静的な垂直荷重１１０ｋｇをかけて縦たわみを
測定した。 （ロ）コーナリング時タイヤ剛性（たてバネ） タイヤにキャンバー角４５°を付けて、垂直荷重１１０
ｋｇをかけて、縦たわみを測定した。 （ハ）実車コーナリング時安定性 熟練ドライバーによるフィーリングにより評価を行っ
た。なお、いずれの評価においても、タイヤバットレス
部の曲面とサイドウォール部の曲面とで明瞭な稜線を有
していない同サイズの従来タイヤをコントロールとして
指数表示した。数値が大きい程結果が良好である。得ら
れた結果を下記の表１に示す。(A) Tire rigidity in straight running (vertical spring) A vertical deflection of 110 kg was applied to the tire to measure its longitudinal deflection. (B) Tire rigidity at cornering (vertical spring) A camber angle of 45 ° is applied to the tire, and a vertical load of 110 is applied.
kg, and the vertical deflection was measured. (C) Stability during actual vehicle cornering The evaluation was made based on the feeling of a skilled driver. In each of the evaluations, a conventional tire of the same size, which does not have a clear ridge line between the curved surface of the tire buttress portion and the curved surface of the sidewall portion, was indicated as an index. The higher the value, the better the result. The results obtained are shown in Table 1 below.

【００１７】[0017]

【表１】 [Table 1]

【００１８】[0018]

【発明の効果】以上説明してきたように、本発明の自動
二輪車用空気入りタイヤにおいては、直進時のタイヤ剛
性を下げることなくコーナリング時の剛性を適正にコン
トロールすることができ、直進時の安定性を損なうこと
なくコーナリング時における安定性と乗り心地性能とを
向上させることができる。また、サイドウォール部の曲
率半径を無限大に近付け平坦面としたときは文字刻印等
のモールドへのポッチがし易くなり、かつポッチの種類
もその曲率に応じて増やす必要がなくなり、共用サイズ
が増加して、効率的である。As described above, in the pneumatic motorcycle tire according to the present invention, the rigidity at the time of cornering can be properly controlled without lowering the tire rigidity at the time of straight traveling, and the stability at the time of straight traveling can be improved. The stability at the time of cornering and the riding comfort performance can be improved without impairing the performance. In addition, when the curvature radius of the side wall portion is close to infinity and a flat surface is used, potting on the mold such as character engraving becomes easy, and the type of the potch does not need to be increased according to the curvature. Increase and be efficient.

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

【図１】 本発明の一例自動二輪車用空気入りタイヤの
部分断面図である。FIG. 1 is a partial cross-sectional view of an example of a pneumatic motorcycle tire according to the present invention.

【図２】（イ）および（ロ）は夫々、本発明の他の一例
自動二輪車用空気入りタイヤの部分断面図である。FIGS. 2A and 2B are partial cross-sectional views of another example of a pneumatic motorcycle tire according to the present invention.

【図３】 本発明の他の一例自動二輪車用空気入りタイ
ヤのバットレス部の拡大部分断面図である。FIG. 3 is an enlarged partial sectional view of a buttress portion of another example of the pneumatic motorcycle tire according to the present invention.

【符号の説明】[Explanation of symbols]

１ 自動二輪車用空気入りタイヤ ２ ビード部 ３ サイドウォール部 ４ トレッド部 ５ バットレス部 ６ 稜線 DESCRIPTION OF SYMBOLS 1 Pneumatic tire for motorcycles 2 Bead part 3 Side wall part 4 Tread part 5 Buttress part 6 Ridge line

Claims (5)

【特許請求の範囲】[Claims] 【請求項１】 左右一対のビード部と、該ビード部に連
なる左右一対のサイドウォール部と、該サイドウォール
部間に配置されたトレッド部とを備えた自動二輪車用空
気入りタイヤにおいて、 前記トレッド部端直下のバットレス部が凹み外表面を有
し、該凹み外表面と、前記サイドウォール部の外表面と
の連結点に、外向きに凸部を形成する稜線が形成されて
いることを特徴とする自動二輪車用空気入りタイヤ。1. A pneumatic motorcycle tire comprising: a pair of left and right bead portions; a pair of left and right side wall portions connected to the bead portion; and a tread portion disposed between the side wall portions. The buttress portion immediately below the end has a concave outer surface, and a ridge line forming an outward convex portion is formed at a connection point between the concave outer surface and the outer surface of the sidewall portion. Pneumatic tires for motorcycles. 【請求項２】 前記サイドウォール部の外表面が実質的
に平坦な表面を形成している請求項１記載の自動二輪車
用空気入りタイヤ。2. The pneumatic tire for a motorcycle according to claim 1, wherein an outer surface of the sidewall portion forms a substantially flat surface. 【請求項３】 前記サイドウォール部の外表面が内向き
に湾曲面を形成している請求項１記載の自動二輪車用空
気入りタイヤ。3. The pneumatic tire for a motorcycle according to claim 1, wherein an outer surface of the sidewall portion forms a curved surface inward. 【請求項４】 前記バットレスの凹み領域が、その曲率
半径ＲＢが前記トレッドショルダー部の曲率半径ＲＳｈ
の２０〜４５％の範囲内にある請求項１〜３のうちいず
れか一項記載の自動二輪車用空気入りタイヤ。Wherein the radius of curvature R Sh recessed areas of the buttress, the radius of curvature R B wherein the tread shoulder portion
The pneumatic tire for a motorcycle according to any one of claims 1 to 3, which is within a range of 20 to 45%. 【請求項５】 タイヤベースラインから、前記稜線まで
の高さｈ１が前記サイドウォール部の高さｈ０の６０〜
７０％の範囲内である請求項１〜４のうちいずれか一項
記載の自動二輪車用空気入りタイヤ。From 5. Tire baseline, 60 the height h 1 to the ridge height h 0 of the side wall portions
The pneumatic tire for a motorcycle according to any one of claims 1 to 4, which is within a range of 70%.
JP03189797A 1997-02-17 1997-02-17 Pneumatic tires for motorcycles Expired - Fee Related JP3748651B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP03189797A JP3748651B2 (en) 1997-02-17 1997-02-17 Pneumatic tires for motorcycles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP03189797A JP3748651B2 (en) 1997-02-17 1997-02-17 Pneumatic tires for motorcycles

Publications (2)

Publication Number Publication Date
JPH10226205A true JPH10226205A (en) 1998-08-25
JP3748651B2 JP3748651B2 (en) 2006-02-22

Family

ID=12343817

Family Applications (1)

Application Number Title Priority Date Filing Date
JP03189797A Expired - Fee Related JP3748651B2 (en) 1997-02-17 1997-02-17 Pneumatic tires for motorcycles

Country Status (1)

Country Link
JP (1) JP3748651B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030039089A (en) * 2001-11-12 2003-05-17 금호산업주식회사 A Pneumatic Radial Tire for Heavy Duty
CN109789741A (en) * 2016-09-25 2019-05-21 伽利略车轮有限公司 Pneumatic tire with annular sidewall concave surface
CN112109502A (en) * 2020-10-14 2020-12-22 厦门正新橡胶工业有限公司 Low aspect ratio pneumatic tire for motorcycle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030039089A (en) * 2001-11-12 2003-05-17 금호산업주식회사 A Pneumatic Radial Tire for Heavy Duty
CN109789741A (en) * 2016-09-25 2019-05-21 伽利略车轮有限公司 Pneumatic tire with annular sidewall concave surface
CN112109502A (en) * 2020-10-14 2020-12-22 厦门正新橡胶工业有限公司 Low aspect ratio pneumatic tire for motorcycle

Also Published As

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