Patent ID: 8191591

Claim:
A pneumatic tire comprising: blocks, demarcated by a circumferential groove formed in the tread and lateral grooves crossing the circumferential groove; and a recessed portion formed in at least one of the wall surfaces at the two ends in the tire width direction of each of the blocks, the circumferential width of the recessed portion increasing from the tread surface side of the block toward the inside of the tire radially, wherein if the length between the innermost end portion of the recessed portion in the tire radial direction and the tread surface is designated A, and the length in the tire circumferential direction of a region between the recessed portion of the block and the lateral groove in the range from the tread surface of the block up to 80% of the depth of the lateral groove is designated B, then 0.8<B/A<2.5 is satisfied.