| 摘要 |
PURPOSE:To keep the performance of a low aspect ratio tire on ice to be high, and moreover, effectively raise its performance on snow. CONSTITUTION:One or two wide circumferential main grooves 2, which extend circumferentially and continuously, are formed on the tread part 1, and one or a plural number of circumferential zigzag grooves 3, 4, which circumferentially extend zigzag and continuously, are formed between at least one tread end and the wide circumferential main groove 2. A plural number of cross direction grooves 5, which extend from one tread end to the other tread end as crossing the circumferential grooves 2, 3, 4, are formed as they shape rough step patterns in the circumferential direction, and a plural number of sipes 7, which straight extend in the cross direction, for example, are formed in each block 6 partitioned by the grooves 2, 3, 4, 5. The aspect ratio of this tire is set to be less than 60%. The width of the wide circumferential main grooves 2 is set to be in the range of 125-250% of the width of the cross direction grooves 5, and to be more than 150% of the width of the circumferential zigzag grooves 3, 4. |
