Patent ID: 8881781

Claim:
A pneumatic tire comprising: at least three circumferential grooves extending along a circumferential direction of the tire on the surface of a tire tread; and a plurality of land portions defined by circumferential grooves, wherein at least one of the land portions defined by two circumferential grooves, being rib-shaped land portion and extending in the circumferential direction of the tire continuously has lug grooves formed in such a manner as to extend in a direction intersecting with the tire circumferential direction, to open at one end thereof into a circumferential groove positioning on a width direction inwardly of the tire and to terminate at the other end, wherein the lug groove extends in the axial direction of the tire and comprises a lateral groove whose one end opens in the circumferential direction inwardly and an oblique groove portion, whose one end communicates with the lateral groove and the other end terminates within the land portion, extends so as to intersect with both the tire axial and circumferential directions, wherein the lateral groove of the lug grooves are each provided with a projection protruding toward the tread surface from the bottom thereof, the height thereof being smaller than the depth of the lug groove, wherein a groove depth of the lug groove in a section of communicating with the circumferential groove and a groove depth of the lug groove on a terminal side than the projection is equal to a groove depth of a circumferential groove on the side where the lug groove opens and; wherein the projection is connected to respective side faces on the lug groove side of circumferentially adjacent land portions defined by lug grooves.