To provide a heavy-duty tire that can improve wet grip performance after abrasion.SOLUTION: Provided is a heavy-duty tire comprising a tread part, wherein the tread part comprises a plurality of circumferential grooves extending continuously in the tire's circumferential direction, wherein the tread part at least comprises a first layer constituting a tread surface, a second layer adjacent to the inner side of the first layer in a radial direction, and a third layer present on the inner side of the second layer in the radial direction, wherein each of the first layer, the second layer, and the third layer is composed of a rubber composition comprising a rubber component and a filler, and wherein Dt is 0.80 or more, t1/H is 0.90 or less, S1/S2 is less than 1.0, and a product (S2×Dt) of S2 and Dt is greater than 10.0, where a tire outer diameter is referred to as Dt (m), a thickness of the first layer is referred to as t1 (mm), a groove depth at a deepest part of the circumferential grooves is referred to as H (mm), a content of silica based on 100 pts.mass of a rubber component in a rubber composition constituting the first layer is referred to as S1 (pts.mass), and a content of silica based on 100 pts.mass of a rubber component in a rubber composition constituting the second layer is referred to as S2 (pts.mass).SELECTED DRAWING: None

    【課題】摩耗後のウェットグリップ性能の向上を図ることができる重荷重用タイヤを提供すること。【解決手段】トレッド部を有する重荷重用タイヤであって、前記トレッド部は、タイヤ周方向に連続して延びる複数の周方向溝を有し、前記トレッド部は、トレッド面を構成する第一層と、前記第一層の半径方向内側に隣接する第二層と、前記第二層の半径方向内側に存在する第三層とを少なくとも備え、前記第一層、前記第二層、および前記第三層がそれぞれゴム成分およびフィラーを含有するゴム組成物により構成され、タイヤ外径をDt(m)、前記第一層の厚みをt1(mm)、前記周方向溝の最深部の溝深さをH(mm)、前記第一層を構成するゴム組成物中のゴム成分100質量部に対するシリカの含有量をS1(質量部)、前記第二層を構成するゴム組成物中のゴム成分100質量部に対するシリカの含有量をS2(質量部)としたとき、Dtが0.80以上であり、t1/Hが0.90以下であり、S1/S2が1.0未満であり、S2とDtとの積(S2×Dt)が10.0超である重荷重用タイヤ。【選択図】なし


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    Title :

    HEAVY-DUTY TIRE


    Additional title:

    重荷重用タイヤ


    Contributors:

    Publication date :

    2024-07-03


    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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