PNEUMATIC RADIAL TIRE

摘要

A pneumatic radial tire, in which stone entrapment in the tread groove is prevented and wet grip property is maintained, comprises: a tread provided on its central part with a central longitudinal groove extending continuously zigzag in the circumferential direction of the tire to form a plurality of zigzag edge portions protruding axially inwardly on the sidewalls thereof; a plurality of platforms formed at the zigzag edge portions and protruding from the sidewalls of the central longitudinal groove ; the depth of the platforms from the tread surface to the platforms being in the range of 40 to 80% of the depth of the central longitudinal grooves; the circumferential length of the platforms being in the range of 15 to 40% of the zigzag pitch of the central longitudinal groove; and the width of the platforms being in the range of 5 to 20% of the width of the central longitudinal groove.