Patent ID: 7909075

Claim:
A pneumatic tire comprising: a shoulder land portion extending in a circumferential direction of the tire, and a narrow groove extending in the circumferential direction of the tire near a ground contact end of the shoulder land portion and dividing the shoulder land portion into a main body land portion on the inner side in a width direction of the tire and a sacrificed land portion on the outer side in the width direction of the tire, the shoulder land portion and the narrow groove being provided on a tread face, wherein the narrow groove comprises: a first enlarged portion extending in the circumferential direction of the tire and enlarging a groove width at a groove bottom only on the sacrificed portion side, a second enlarged portion being formed adjacently on the tread face side of the first enlarged portion, extending in the circumferential direction of the tire, and enlarging a groove width only on the sacrificed portion side, a projection portion being formed between the first enlarged portion and the second enlarged portion, and extending in the circumferential direction of the tire while projecting toward the main body land portion from an inner wall on the sacrificed land portion side, and a flat face portion having a depth, from the tread face, of 30% or more of a groove depth of the narrow groove, and having an inner wall on the sacrificed land portion side and an inner wall on the main body land portion side, both inner walls extending in the circumferential direction of the tire, wherein the maximum groove width of the first enlarged portion and the maximum groove width of the second enlarged portion are made different from each other.