Bridgestone Tire Company Limited

Hidenori Takahashi

Shigeo Watanabe

Toshiyuki Sogi

Muneyoshi Maeda

Hiroshi Tamura

A pneumatic radial tire for heavy load vehicles comprises a carcass and a belt for reinforcement of the carcass, said belt including tension members composed of at least two rubberized metal cords crossing with each other at a cord angle of not more than 25.degree. with respect to equatorial plane of tire, in which said metal cords is coated with a rubber having a modulus of elasticity of 40-80 Kg/cm.sup.2, a distance between the cords in each tension member is widened to 0.2-0.75 d based on a diameter d of the cord, and an interlaminar cord distance D between the tension members is uniformly shortened to 0.2-0.4 d at a central region extending within 50-80% of a superposed width of the tension members.

Pneumatic radial tire for heavy load vehicles

A radial tire having a highly durable bead structure, comprising a carcass ply having a high modulus of elasticity is disclosed. The bead is constructed to satisfy the following conditions, i.e.,

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Tokorozawa, Japan

Hidenori Takahashi