Patent ID: 8146631

Claim:
A pneumatic tire comprising: a tread portion provided with groove portions and land portions; and sipes provided in the land portions, wherein each of the sipes has at least one end in a longitudinal direction being terminated within the corresponding land portion, each sipe is provided with first offset portions protruding toward one side in a sipe thickness direction; and second offset portions protruding toward the other side in the sipe thickness direction at a position on an inner side, in a tire radial direction, of a position at which the first offset portions protrude, the first offset portions are located at the center and at both ends in the longitudinal direction of the sipe when viewed from above, when viewed from the side each of the first offset portions is inclined to one side in the sipe thickness direction relative to the tire radial direction, from a point closer to the position of a tire tread surface in an original state to the halfway point in the sipe depth direction, and is inclined to the other side in the sipe thickness direction relative to the tire radial direction from the halfway point in the sipe depth direction to the bottom of the sipe, each of the second offset portions is located between the first offset portions when viewed from above, when viewed from the side each of the second offset portions extends in parallel with the tire radial direction from a point closer to the position of a tire tread surface in the original state to the halfway point in the sipe depth direction, and extends with an incline to the other side in the sipe thickness direction relative to the tire radial direction, from the halfway point in the sipe depth direction to the bottom of the sipe, wherein based on the shapes of the first offset portions and the second offset portions, a sipe path length (M 2 ) in a worn state is set to be maximum value at the bottom of the sipe, and for each sipe, a sipe length (L 2 ) in a worn state is set to be substantially the same as a sipe length (L 1 ) in an original state, and a sipe path length (M 2 ) in the worn state is set to be larger than a sipe path length (M 1 ) in the original state.