Patent ID: 8875755

Claim:
A pneumatic tire for a motorcycle comprising a tread comprising: a center portion block row comprising a plurality of blocks that are disposed along a circumferential direction at a width direction center of the tread; at each tread end side of the tread at the tire width direction outer side of the center portion block row, a tread end-side block row comprising a plurality blocks that are disposed along the circumferential direction; and a middle portion block row comprising a plurality blocks that are disposed between the center portion block row and each tread end-side block row and along the circumferential direction, wherein: each of the blocks in the center portion block row is provided with at least one recessed portion in which a protrusion protruding from the center block is formed on the bottom portion of the recessed portion of the center block, each block in the middle portion block rows is provided with a recessed portion in which a protrusion protruding from the middle block is formed on the bottom portion of the recessed portion of the middle block, and each block in the tread end side block rows is provided with a recessed portion, the total number of the recessed portions provided at the blocks configuring each middle portion block row is configured to be fewer than the total number of the recessed portions provided at the blocks configuring the center portion block row and the total number of the recessed portions provided at the blocks configuring each tread end-side block row is configured to be fewer than the total number of the recessed portions provided at the blocks configuring the center portion block row; and wherein in each block of the center portion block row, the tread surface of the protrusion is formed parallel to the tread surface of the center block, wherein narrow groove-like clearances formed between side walls of the recessed portions and side walls of the protrusions in the center blocks and the middle blocks are configured to have a dimension in which the side walls of the recessed portions and the side walls of the protrusions do not contact each other even when the blocks contact a road surface, and wherein each of the blocks of the center portion block row comprises at least two recessed portions respectively.