| 摘要 |
PROBLEM TO BE SOLVED: To reduce a pattern noise without decreasing wet performance. SOLUTION: A same angle is set to the angleθ2 of a side at the tread side of a shoulder block 24 with respect to a contour line at an earth-shaped tire tread side and the angleθ1 of a side at the tread side of shoulder block 28 with respect to a contour line at an earth-shaped tire tread side. In addition, the same angle is set to the angleθ2 of a side at the tread side of a second block 32 with respect to a contour line at an earth-shaped tire tread side, and the angleθ1 of a side at the tread side of a second block 36 with respect to a contour line at an earth-shaped-tire tread side. The shoulder blocks 24, 28 and the second blocks 32, 36 form the same pitch level. Adjusting phases in the peripheral direction of a tire of the blocks at right and left interferes the same level pitch noises, respectively, with each other. The result reduces a pattern noise. Changing no negative ratio decreases no wet performance or steering stability. |
