Patent ID: 8413696
Filing Date: 2013-04-09
Classification: B60C

Abstract:
1. A pneumatic tire having main grooves extending in the tire circumferential direction formed in a tread, wherein a main groove has a plurality of narrow grooves in its sidewalls, a length L the narrow groove has at least one or more bend portions, an end portion of the narrow groove on the tread side does not open to the tread surface and is located closest to the tread side, an end portion of the narrow groove on the groove bottom side does not open to the groove bottom of the main groove and is located closest to the groove bottom side, and a length L a width w of the narrow groove is at least not less than 0.5 mm and not more than 0.25 times a width W of the main groove, a depth d of the narrow groove is at least not less than 0.2 mm and not more than 0.5 times the width W of the main groove, and a space p of the narrow groove is at least not less than 0.4 mm and not more than 0.5 times the width W of the main groove.