Patent ID: 7281554

Claim:
A pneumatic tire including a tread having plural blocks divided by plural grooves that mutually intersect, characterized in that: each of leading side edges and trailing side edges of the blocks has a height that changes in a tire widthwise direction; a portion of the leading side edge that initially contacts a road surface being a first highland portion which is positioned on a tire radial-direction outer side than the remaining portion of the leading side edge that later contacts the road surface; and a portion of the trailing side edge that lastly separates from a road surface being a second highland portion which is positioned on a tire radial-direction outer side than the remaining portion of the trailing side edge that initially separates from the road surface, wherein the first highland portion and the second highland portion are connected to each other and extend continuously in a tire circumferential direction and the position of the highland portion in the tire widthwise-direction is changed in the tire circumferential direction, and each edge, in the tire widthwise direction, of each block comprises a convex surface that is smoothly chamfered along the tire circumferential direction over at least a portion of each edge and defines a line edge at the top of a block sidewall, such that the first highland portion reaches a corner of the leading side edge, which corner initially contacts a road surface, and the second highland portion reaches a corner of the trailing side edge, which corner lastly separates from a road surface.