| 摘要 |
PROBLEM TO BE SOLVED: To suppress the occurrence or water of a heel and a toe without substantially lowering draining ability. SOLUTION: Two trains of block trains 5 each consisting of blocks 4 are formed in a division state at a part of the central part of a tread surface T, block trains 7 consisting of blocks 6 are formed in a division state at two shoulder parts, and subgrooves 2 and cut grooves 3 are formed from the tire equator side toward both outer sides in a state to provide a directional property where the grooves are inclined to the opposite rotation side of the tire. Further, the inclination angle of the subgroove 2 with the peripheral direction of the tire is gradually decreased from the tire equator side toward the outside. An inclination angleθ0 on the tire equator side is set to a range of 70 deg.<=θ0 <=90 deg., an inclination angleθ1 on the tire outside is set to a relation of 30 deg.<=θ1 <θ0 , and the inclination angle of the cut groove 3 with the tire peripheral direction is gradually increased from the tire equator side toward the outside, the inclination angleθ2 on the tire equator side is set to a range of 20 deg.<=θ2 <=50 deg., and the inclination angleθ3 on the tire outside side is set to a range of 30 deg.<θ3 <90 deg.. |
