| 摘要 |
A pneumactic tire having a contact shape of its tread surface, which has a maximum contact length L in the circumferential direction of the tire on the center of a maximum contact width and a contact length ? in the tire circumferential direction at a location at a distance of 90 % of one half of the maximum contact width from the center of the maximum contact width, on each side of this center, in which the ratio of the contact length ? to the maximum contact length L is smaller than 0.65, and which has toe end and heel end contours comprising a curve gradually reducing the contact length in the tire circumferential direction towards each side end from the location of the maximum contact length L.
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