Patent ID: 9085202
Filing Date: 2015-07-21
Classification: B60C

Abstract:
1. A pneumatic tire comprising: a tread portion, a plurality of longitudinal grooves formed in the tread portion extending in a circumferential direction of the tire, a plurality of transverse grooves formed in the tread portion extending in a width direction of the tire formed thereon, a plurality of land portions formed by said longitudinal grooves and said transverse grooves, wherein among the plurality of longitudinal grooves, outermost longitudinal grooves situated at either side in the width direction of the tire in the tread portion extend in the circumferential direction of the tire in a zigzag fashion, among the plurality of transverse grooves, a plurality of first transverse grooves, which are situated at an outer portion connected from an outer side of the width direction of the tire to the outermost longitudinal grooves in the tread portion, extend from the outermost longitudinal grooves toward one side in the circumferential direction of the tire and is connected to the outermost longitudinal grooves, as it gradually extends from the outer side of the width direction of the tire to an inner side thereof, a plurality of second transverse grooves, which are situated at an inner portion connected from the inner side of the width direction of the tire to the outermost longitudinal grooves in the tread portion, extend from the outermost longitudinal grooves toward the one side in the circumferential direction of the tire and are connected to the outermost longitudinal grooves, as it gradually extends from the inner side of the width direction of the tire to the outer side thereof, a position of the circumferential direction of the tire at which the plurality of first transverse grooves are each situated in the outer portion and a position of the circumferential direction of the tire at which the plurality of second transverse grooves are each situated in the inner portion coincide with each other, the widths of the second transverse grooves are equal to or larger than 1.5 mm, and less than or equal to 5.0 mm, and narrower than those of the first transverse grooves, the outermost longitudinal grooves are configured such that a first longitudinal groove, which extends toward the one side in the width direction of the tire, as it gradually goes from the one side in the circumferential direction of the tire to another side thereof, and a second longitudinal groove, which extends toward another side in the width direction of the tire, as it gradually goes from the one side in the circumferential direction of the tire to another side thereof, and has a length shorter than that of the first longitudinal groove, are connected alternately along the circumferential direction of the tire, and the direction in the circumferential direction of the tire which the first longitudinal groove extends toward outside in the width direction thereof and the direction in the circumferential direction of the tire which the first transverse groove extends from the outermost longitudinal groove toward outside in the width thereof are the same.