To provide a heavy load tire improved in low fuel consumption performance, wet grip performance, abrasion resistance, chipping resistance, and tear resistance.SOLUTION: A heavy load tire 2 is configured such that a tread has a plurality of main grooves 24 continuously extending in a tire circumferential direction; the tread has a cap rubber layer 30 constituting a tread surface, and a base rubber layer 28 adjacent to the cap rubber layer inward in a radial direction; the cap rubber layer and the base rubber layer are constituted by a rubber composition including a rubber constituent; the rubber constituent constituting the cap rubber layer includes isoprene rubber, styrene-butadiene rubber, and butadiene rubber; the rubber composition constituting the cap rubber layer includes, based on the rubber constituent 100 pts.mass, 30 mass% or more silica having a nitrogen adsorption specific surface (N2SA) of 180 m2/g or more; and the rubber composition constituting the base rubber layer has tanδ of 0.04-0.07 at 70°C.SELECTED DRAWING: Figure 2

    【課題】低燃費性能、ウェットグリップ性能、耐摩耗性能、耐チッピング性能、および耐テア性能が改善された重荷重用タイヤを提供する。【解決手段】トレッドが、タイヤ周方向に連続して延びる複数の主溝24を有し、前記トレッドが、トレッド面を構成するキャップゴム層30および前記キャップゴム層の半径方向内側に隣接するベースゴム層28を有し、前記キャップゴム層および前記ベースゴム層が、ゴム成分を含有するゴム組成物により構成され、前記キャップゴム層を構成するゴム成分が、イソプレン系ゴム、スチレンブタジエンゴム、およびブタジエンゴムを含み、前記キャップゴム層を構成するゴム組成物が、ゴム成分100質量部に対し、窒素吸着比表面積(N2SA)が180m2/g以上のシリカを30質量部以上含有し、前記ベースゴム層を構成するゴム組成物の70℃におけるtanδが0.04~0.07である重荷重用タイヤ2。【選択図】図2


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    Title :

    HEAVY LOAD TIRE


    Additional title:

    重荷重用タイヤ


    Contributors:

    Publication date :

    2022-03-10


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60C VEHICLE TYRES , Fahrzeugreifen / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS / C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen



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