To provide a heavy duty pneumatic radial tire achieving cost reduction and improvement of rim mountability without deteriorating bead durability.SOLUTION: A heavy duty pneumatic radial tire comprises at least one steel chafer 6 and at least one organic fiber chafer 7 as a bead reinforcement layer. The organic fiber chafer 7 is wound up from a tire inner face side to a tire outer face side in the vicinity of a bead core 11. The steel chafer 6 is disposed only at the tire outer face side. The lower end 61E of the steel chafer is disposed between the center of the bead core 11 in a tire radial direction and the upper end thereof, and the organic fiber chafer 7, steel chafer 6 and carcass ply 4 are arranged in this order from the tire outer face side.SELECTED DRAWING: Figure 2

    【課題】タイヤにおけるビード耐久力を低下させることなくコスト削減及びリム組性の改善を実現することにある。【解決手段】ビード補強層として1つ以上のスチールチェーハー6と1つ以上の有機繊維チェーハー7とを備え、有機繊維チェーハー7は、ビードコア11の周りでタイヤ内面側からタイヤ外面側まで巻き上げられ、スチールチェーハー6は、タイヤ外面側のみに配され、スチールチェーハーの下端61Eは、ビードコア11のタイヤ径方向中央より上端の間に配され、タイヤ外面側から有機繊維チェーハー7、スチールチェーハー6、カーカスプライ4の順に配されている。【選択図】図2


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    Title :

    HEAVY DUTY PNEUMATIC RADIAL TIRE


    Additional title:

    重荷重用空気入りラジアルタイヤ


    Contributors:

    Publication date :

    2019-07-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60C VEHICLE TYRES , Fahrzeugreifen



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