PNEUMATIC RADIAL TYRE

摘要

A pneumatic radial tire, in which stone entrapment in the tread groove is prevented and the wet grip property is maintained, comprising: a tread provided with a central longitudinal groove on the central part thereof; the central longitudinal groove extending continuously zigzag in the circumferential direction of the tire along the equator of the tire to form a plurality of angled portions of the central longitudinal groove, and the groove provided in each zigzag edge portion with a platform; the platform in each zigzag edge portion being formed on one side of the sidewalls which is located more closely to the tire equator than the other side. The depth of the platforms from the tread surface to the platforms is in a range of 40 to 80% of the depth of the central longitudinal grooves; the circumferential length of the platform is in a range of 15 to 40% of the zigzag pitch of the central longitudinal groove; and the width of the platforms is in a range of 5 to 20% of the width of the central longitudinal groove.