| 摘要 |
PROBLEM TO BE SOLVED: To maintain braking and driving performance and prevent partial wear from an initial stage of wear to its terminal stage without using too many sipes on a tread surface. SOLUTION: A waveform part 7 repeating a zigzag in a vertical groove side along a tire circumferential direction with a pitch length P of this zigzag at 3 to 8% of a tread width is provided from the tread surface 1 toward a groove bottom 6 direction in a sidewall part 5 on the vertical groove 2 side of a land part. The waveform part has wall faces A and B each slanting toward a groove bottom from each top edges a1 and b1. The wall face A has one slant face composed of four edges, the top edge a1 of the tread surface, a first outer edge a2 protruding toward the vertical groove side, a bottom edge a3 in a groove bottom side, and an inner edge a4 of a bent portion in a land part side. |
