| 摘要 |
PURPOSE:To suppress channel contraction on a tread face of a tire for reduction variation in ground pressure by arranging spacers having specified thickness and height respectively on channel walls of corner inlet and outlet portions of land portions formed on a crown portion. CONSTITUTION:Plural channel portions 1, 1' extending toward peripheral direction in zigzag-wise continuously, and plural land portions 2,2' divided with respective channel portions 1,1' are formed respectively on a crown portion of a tire formed in like a toroid. In above constraction, respective spacers 4, 4a are arranged respectively on respective corner inlet portions 3, 3a in respective channel portions 1, 1'. And respective spacers 4a are made to project from the channel walls 1a of respective corner inlet portions 3a, and together with setting up the width W2 to 0.25-0.75 times of the width W1 of the channel portion 1, the height H2 is set up equal or under the depth H of channel portion 1, especially about 1/2. According to this constitution, channel contraction on the tread face of the tire is suppressed and variation in ground pressure is made to reduce. |
