For a cap tread layer of a pneumatic tire, a rubber composition is used, which contains from 60 to 90 parts by mass of silica per 100 parts by mass of a diene rubber containing from 15 to 30 mass % of a natural rubber, from 40 to 70 mass % of a terminal-modified styrene-butadiene rubber having a vinyl content of from 35 to 45 mass %, and from 15 to 30 mass % of a modified butadiene rubber obtained by modifying an active terminal of a conjugated diene polymer with at least a hydrocarbyloxysilane compound, the total of these being 100 mass %. A hardness Hu of the undertread Layer and a hardness Hc of the cap tread layer satisfy the relationship of Hu>Hc. The hardness Hc is 63 or greater and 67 or less. A difference ΔH between the hardness Hu and the hardness Hc is 10 or more.


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    Title :

    PNEUMATIC TIRE


    Contributors:

    Publication date :

    2024-02-15


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60C VEHICLE TYRES , Fahrzeugreifen / C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen



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