Patent ID: 8627864

Claim:
A pneumatic tire comprising: a pair of center circumferential direction grooves that are provided at both tire width direction sides with a tire equatorial plane interposed therebetween, and that extend in a tire circumferential direction; a plurality of first lug grooves that connect one of the center circumferential direction grooves and the other of the center circumferential direction grooves, and that are inclined with respect to a tire width direction, directions of inclination of the plurality of first lug grooves being alternately in opposite directions in the tire circumferential direction, wherein groove widths of end portions of the first lug grooves at a first ground contact side are narrower than other portions of the first lug grooves; a plurality of second lug grooves that are provided at both tire width direction sides with the tire equatorial plane interposed therebetween, extend from the center circumferential direction grooves to tread edge sides, and are inclined with respect to the tire width direction, directions of inclination of the plurality of second lug grooves being in opposite directions on one side and the other side in the tire width direction across the tire equatorial plane; a pair of shoulder circumferential direction grooves that are provided at tire width direction outer sides of the center circumferential direction grooves with the tire equatorial plane interposed therebetween, extend in the tire circumferential direction, and delineate second blocks together with the center circumferential direction grooves and the second lug grooves; and sub-grooves that traverse the second blocks in the tire circumferential direction to connect one of the second lug grooves and another of the second lug grooves, and that extend along a direction that is orthogonal to the direction of inclination of the second lug grooves.