Pneumatic tire with sipe having concave grooves

摘要

A pneumatic tire has a sipe is formed in a land portion of a tread surface. The sipe has a wide region in which a sipe width is made larger than a tread at position which is at a distance from the tread. The wide region is constructed by alternately providing a concave groove extending in a depth direction of the sipe in both sides of a sipe wall surface along a longitudinal direction of the sipe.