B - Operations – Transporting – 60 – C
Patent
B - Operations, Transporting
60
C
B60C 11/117 (2006.01) B60C 11/03 (2006.01) B60C 11/04 (2006.01) B60C 11/13 (2006.01)
Patent
CA 2200519
A pneumatic radial tire has a tread pattern having a pair of straight main grooves each having a width equal to 8-13 percent of a ground contact width W of the tire and extending in parallel on opposite sides of an equator of the tire, a plurality of lug grooves extending across shoulder regions formed on the outersides of the pair of main grooves from the pair of main grooves outwardly toward the ends of the ground contact surface of the tire to form in cooperation with the main grooves successive rows of blocks, and a plurality of V-shaped sub-grooves in the shoulder regions spaced at a predetermined pitch apart in the circumferential direction of the tire and extending divergently with respect to the direction of reverse rotation of the tire, wherein the ratio of a distance W1 between respective centers of the main grooves to the ground contact width W is in the range of 0.2 ~ W1/W ~ 0.4; an angle a of inclination of the lug grooves with respect to the circumferential direction of the tire as viewed from the reverse tire rotating direction is in the range of 90°-130°; and an angle a defined by the V-shaped sub-grooves is in the range of 15 °-35 °.
Hashimoto Yoshimasa
Kuze Tetsuya
Suzuki Toshihiko
Gowling Lafleur Henderson Llp
The Yokohama Rubber Co. Ltd.
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