| 摘要 |
PROBLEM TO BE SOLVED: To improve abrasion resistant performance without lowering on-snow travelling performance. SOLUTION: First and second block rows R1, R2 in which blocks divided by lateral grooves 4 are arranged in the circumferential direction on both sides of a piece of longitudinal groove 3b extending in the circumferential direction are arranged on a tread part 2. A plurality of sipings S are formed on each of the blocks 5a, 5b of the first and second block rows. The lateral grooves 4a, 4b actually open at opposed positions through the longitudinal groove 3a. Deformation restraining parts 6 to restrain deformation in the tire circumferential direction of the blocks facing the lateral grooves are provided on the lateral grooves 4a, 4b of the first and second block rows R1, R2. The deformation restraining parts 6 are arranged on every other blocks in the circumferential direction on each of the block rows R1, R2 and arranged zigzag to straddle over the longitudinal groove 3a by dislocating their phases in the tire circumferential direction. COPYRIGHT: (C)2007,JPO&INPIT |
