The Yokohama Rubber Co., Ltd.

Takashi Yamashita

Tetsuya Kuze

Toshihiko Suzuki

Tuneo Morikawa

Kazuyoshi Saneto

A pneumatic radial tire characterized in that:

Pneumatic radial tire with improved bead structure

In a tire tread pattern in which a plurality of block patterns are disposed on a tire tread surface in the circumferential direction and their pitch lengths are varied, lug grooves inside of said block patterns extend in the direction of a grounding width, and their angles relative to the direction of grounding width are varied in accordance with the change of the pitch lengths of said block patterns.

Tire tread pattern

A pneumatic radial tire having a block pattern asymmetric about the right and left portions on the ground-contacting portion of the tire which has a specific area ratio of grooves and a specific angle of subgrooves on the ground-contacting portion of the tire.

Growing community of inventors

Hiratsuka, Japan

Takashi Yamashita