| 摘要 |
A pneumatic radial tire for passenger car has a directional tread pattern (with respect to a rotating direction of tire) defined by a circumferential center groove, a plurality of directional slant grooves disposed at intervals in the circumferential direction of the tire, and a plurality of blocks formed at intervals in both circumferential and axial directions of the tire, in which these blocks form a pair of central block rows and a pair of side block rows, and surfaces of acute corner portions of blocks constituting the central block row and the side block row located outward and inward in the axial direction of the tire at given length, and chamfered acute corner portions of blocks constituting the central block row and the side block row are connected to each other at their chamfered shallowest tips.
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