| 摘要 |
PURPOSE:To improve the performance of a tire on an icy and snowy road surface by disposing three or more acute protruding parts at intervals along the circumference of the tire in a plurality of blocks formed in a tread part at least at one edge part in the tire width direction of them. CONSTITUTION:In a tread part are formed at least two circumferential main grooves 2, 3, lateral main grooves 4, 5 extending between the circumferential main grooves 2, 3, and a lateral main groove 6 extending from the circumferential main grooves 2, 3 positioned on the outermost side in the tire width direction toward a side edge of the tread part respectively, so more than three lines of block lines 7-9 are separated. A plurality of sipes 10-12 are formed in each block 7a-9a of each block line 7-9 respectively. In this constitution, three or more acute protruding parts 7d, 8d; 8e, 9b; 8f, 9c are disposed at intervals along the tire circumference at least at one edge part of the tire width of the blocks 7a-9a. |
