| 摘要 |
PROBLEM TO BE SOLVED: To improve wandering performance without generating partial abrasion. SOLUTION: This pneumatic tire has a shoulder block B. The shoulder block B has a slope 10 for connecting a buttress surface 9 to a tread surface 2S. An upper ridge E1 at which the slope 10 crosses the tread surface 2S is formed of a circular arc curve having a curvature radius R1, and a lower ridge E2 at which the slope 10 crosses the buttress surface 9 is formed of a circular arc curve having a curvature radius R2 larger than the curvature radius R1. The slope defines a conical curved surface 12 for smoothly connecting the upper ridge E1 to the lower ridge E2. The radial inner edge 9i of the buttress surface 9 defines a circumferential line CL about the tire axis, and the buttress surface 9 has a bent curved surface having a swelling part 13 that swells gradually outside in the tire axis direction from the circumferential line CL to the radial outward part. |
