Bridgestone Corporation

Naomichi Funato

Tetsuhito Tsukagoshi

Mie Nonaka

Shinji Murase

A pneumatic tire is mounted onto a rim with maximum loading, and with an air pressure corresponding to maximum loading, such that the ground contact shape has a gradually decreasing circumferential direction length from the tire width direction center to the portion corresponding towards the tire width direction outermost circumferential groove, followed by the ground contact shape having a gradually increasing circumferential direction length towards the tire width direction outside. In the ground contact shape, the relationships 0.02&#x2266;(A&#x2212;B)/L&#x2266;0.1, and 0.02&#x2266;(C&#x2212;B)/L&#x2266;0.1 are satisfied, in which A is the maximum length in the circumferential direction of the tire width direction outermost rib, L is the circumferential direction length of the tire width direction center, and B and C are distances in a tire circumferential direction which depend on the width of the tire width direction outermost rib and the width of the second rib from the outside in the tire width direction.

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Kodaira, Japan

Naomichi Funato