| 摘要 |
PROBLEM TO BE SOLVED: To restrain dispersion of a tread gauge caused by a large difference of a block and to improve steering stability. SOLUTION: The capacity of a large land part 24L of a large pitch part is relatively increased by making an angleθ1 against the tire radial direction of a wall surface of a peripheral directional groove 14 of the large pitch part larger than an angleθ3 against the tire radial direction of the wall surface of the peripheral directional groove 14 of a small pitch part. It comes to be possible to absorb a part of rubber flowing in a recessed part of a mold for formation of a land part by capacity increase of the land part at the time of molding with the mold and to restrain recession of a belt, that is, increase of a tread gauge G1 of the large land part 24L of the large pitch part against a tread gauge G3 of a small land part 24S of the small pitch part. As dispersion of the tread gauges is restrained, steering stability is improved. |
