Patent ID: 7188651

Claim:
A pneumatic tire comprising a tread having a base layer provided on an inside in a radial direction and a cap layer provided on an outside in the radial direction and provided with a groove on an outer peripheral surface constituting a tread surface, thereby forming a plurality of circular land portions, wherein the base layer has a hardness set to be lower than that of the cap layer, the base layer is provided with a plurality of circular convex portions which is arranged in an axial direction, is protruded in the radial direction and is extended in a circumferential direction, a plurality of circular convex portions is provided in one circular land portion, the circular convex portions being buried in the circular land portion and a height h 1 thereof is set to be 15% to 50% of a depth d 1 of the groove, and a height Δh of a base bottom portion of the base layer is set to be equal to or smaller than 1.6 mm from an inner bottom portion of the groove.