To provide a pneumatic tire for a motor cycle that improves wet grip performance while securing operation stability during turning.SOLUTION: A tread part is provided with a first inclined groove 21 outside in a tire width direction, which is inclined and extended in the same direction as a tire rotating direction from a vicinity of a tire equator and a short groove 22 arranged on an extension line of an end outside in the tire width direction of the first inclined groove. The end outside in the tire width direction of the first inclined groove is positioned near a point away by a quarter of a tread width TW from the tire equator toward the outside in the width direction, and an inner end in the tire width direction of the short groove is positioned in a range of 1/4 to 5/16 of the tread width, from the tire equator to the outside in the width direction. Inclination angles of the first inclined groove relative to the tire circumferential direction increase as approaching toward the outside in the width direction. An angle θformed by a groove wall at an end outside in the width direction of the forst inclined groove with respect to a direction perpendicular to a tire surface and an angle θformed by a groove wall at an end inside in the width direction of the short groove with respect to a direction perpendicular to the tire surface satisfies a relational expression of θ>θ.SELECTED DRAWING: Figure 2

    【課題】旋回時における操縦安定性を確保しつつウェットグリップ性を向上した自動二輪車用空気入りタイヤを提供する。【解決手段】踏面部に、タイヤ赤道の近傍から、タイヤ幅方向外側であってタイヤ回転方向と同方向に傾斜して延びる第1の傾斜溝21と、そのタイヤ幅方向外側端の延長線上に配置された短溝22とを有し、第1の傾斜溝のタイヤ幅方向外側端が、タイヤ赤道から幅方向外側にトレッド幅TWの1/4の点の近傍に位置し、短溝のタイヤ幅方向内側端が、タイヤ赤道から幅方向外側にトレッド幅TWの1/4〜5/16の範囲に位置し、第1の傾斜溝のタイヤ周方向に対する傾斜角度が幅方向外側に向かうにつれ増大し、第1の傾斜溝の幅方向外側端の溝壁がタイヤ表面に垂直な方向に対してなす角度θAと、短溝の幅方向内側端の溝壁がタイヤ表面に垂直な方向に対してなす角度θBとが、θA>θBの関係を満足する自動二輪車用空気入りタイヤである。【選択図】図2


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    Title :

    PNEUMATIC TIRE FOR MOTOR CYCLE


    Additional title:

    自動二輪車用空気入りタイヤ


    Contributors:

    Publication date :

    2019-02-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60C VEHICLE TYRES , Fahrzeugreifen



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