Patent ID: 8171969

Claim:
A pneumatic tire structured such that a sipe is formed in a land portion of a tread surface, wherein wide portions extending in a sipe length direction are wider than an opening portion of the sipe and are formed in each of a kick-out side and a step-in side of said sipe, and a total of heights of said wide portions in the kick-out side of said sipe is made larger than a total of heights of said wide portions in the step-in side of the sipe, wherein the sipe width is no less wide than the width of the opening portion at each depth in a sipe depth direction from the opening portion to a bottom portion, and wherein the wide portions are formed by concaving an inner wall surface of the sipe, and the cross-sectional shapes thereof are rectangles, wherein the kick-out side and the step-in side have the same number of wide portions, and the height of said wide portions in the kick-out side of said sipe is larger than the height of said wide portions in the step-in side of said sipe.