PROBLEM TO BE SOLVED: To provide a pneumatic tire for a vehicle that is improved in wet performance and roll resistance performance as a narrow-width, large-diameter radial tire.SOLUTION: When a rim is incorporated in a tire 1 and internal pressure is 250 kPa or larger, a ratio SW/OD of a sectional width SW of the tire to an outer diameter OD (mm) satisfies less than 0.26 for a sectional width SW of less than 165 (mm) and 2.135×SW+282.3≤OD for a sectional width SW of 165 (mm) or larger. Tread rubber has a dynamic storage elastic modulus E' of 6.0-12.0 MPa and a loss tangent tanδ of 0.05-0.15. A plurality of sipe 9 are arranged at at least one land part 8 to a predetermined pitch length L, and 0.6 W≤Ws≤1.2 W and L≤Ls≤3 L hold for a land width W, a tire width-directional sipe component total length Ws of sipes within a range of one pitch length L, a pitch length L, and a tire periphery-directional sipe component total length Ls of sipes within the range of one pitch length L.SELECTED DRAWING: Figure 2

    【課題】狭幅、大径のラジアルタイヤにおいて、ウェット性能および転がり抵抗性能を向上させた乗用車用空気入りラジアルタイヤを提供する。【解決手段】タイヤ1をリムに組み込み、内圧を250kPa以上とした際に、タイヤの断面幅SWが165(mm)未満の場合は、外径OD(mm)との比SW/ODが0.26以下であり、SWが165(mm)以上の場合は、2.135×SW+282.3≦ODを満たし、トレッドゴムは、動的貯蔵弾性率E’が6.0〜12.0MPa、損失正接tanδが0.05〜0.15であり、少なくとも1本の陸部8に、複数本のサイプ9が所定ピッチ長Lで配設されるとともに、陸部幅Wと、1つのピッチ長Lの範囲内のサイプのタイヤ幅方向サイプ成分総長Wsと、ピッチ長Lと、1つのピッチ長Lの範囲内のサイプのタイヤ周方向サイプ成分総長Lsとの関係が、0.6W≦Ws≦1.2WおよびL≦Ls≦3Lを満たす。【選択図】図2


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    Titel :

    PNEUMATIC RADIAL TIRE FOR VEHICLE


    Weitere Titelangaben:

    乗用車用空気入りラジアルタイヤ


    Beteiligte:
    HATANAKA SHINTARO (Autor:in) / KUWAYAMA ISAO (Autor:in)

    Erscheinungsdatum :

    2016-05-12


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    B60C VEHICLE TYRES , Fahrzeugreifen



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