| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire improving the running performance on a wet road surface without lowering the performance on ice. SOLUTION: In the tire meridian cross section of this pneumatic tire, which is provided with a block row 10 or a rib divided by main grooves 9 extending in the tire circumferential direction on a tread surface 1A, the surface of the block row 10 or the rib is formed of an arc having a curvature radius R2 larger than a curvature radius R1 of an outer contour line of the tread surface 1A and the ratio of the curvature radius R1 to the curvature radius R2, R2/R1 is set to 1.4 or more. |
