To provide a heavy-load tire excellent in uneven wear resistance.SOLUTION: A tread part 2 includes: each pair of crown main grooves 4 arranged on both sides of a tire equator C; one crown land part 8 which is divided between a shoulder main groove 5 and a tread end Te; each pair of middle land parts 7; shoulder land parts 9; and a shoulder lateral groove 29 on at least one of the shoulder land parts. Widths Wc, Wm, Ws in each tire axial direction of the crown land part, the middle land part and the shoulder land part, a tire axial direction maximum length Lsm, a tire axial direction total length Lst and a tire outer diameter H of the shoulder lateral groove satisfy the formulae (1)-(3). The tread part is formed of a rubber composition including 90 mass% or more of isoprene rubber and a carbon black having an average particle diameter equal to or less than 20 nm and/or CTAB equal to or greater than 130 m/g. Wc:Wm:Ws=1.00:0.80-1.20:1.10-1.60 (1), 0

    【課題】耐偏摩耗性能に優れた重荷重用タイヤの提供。【解決手段】トレッド部2に、タイヤ赤道Cの両側に配される各一対のクラウン主溝4、ショルダー主溝5とトレッド端Teとの間で区分される1本のクラウン陸部8、各一対のミドル陸部7、ショルダー陸部9及びショルダー陸部の少なくとも一方にショルダー横溝29が設けられ、クラウン陸部、ミドル陸部、ショルダー陸部の各タイヤ軸方向の幅Wc、Wm、Ws、ショルダー横溝のタイヤ軸方向最大長さLsmとタイヤ軸方向総長さLst及びタイヤ外径Hが式(1)〜(3)を満たし、トレッド部は、イソプレン系ゴムを90質量%以上と、平均粒子径20nm以下及び/又はCTABが130m2/g以上のカーボンブラックとを含むゴム組成物で構成される。Wc:Wm:Ws=1.00:0.80〜1.20:1.10〜1.60(1)、0<Lsm/Ws≦0.15(2)、0<Lst/H≦2.30(3)【選択図】図1


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    Title :

    HEAVY-LOAD TIRE


    Additional title:

    重荷重用タイヤ


    Contributors:
    KASAI YUKI (author) / HIRO MASATAKA (author)

    Publication date :

    2020-04-09


    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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