Patent ID: 8042583

Claim:
A pneumatic tire for off-road traveling, comprising: a tread portion provided with a block pattern made up of a plurality of blocks each having a tread surface facing radially outward and a wall surface extending radially inwardly from the edge of said tread surface, and said plurality of blocks include recess blocks each provided with a recess portion which extends on the wall surface in the recess block in a tire radial direction, and whose radially outer end opens at the tread surface of the recess block and whose length in the tire radial direction along the wall surface is from 10 to 70% of the height of each block, wherein the recess portion is located at a corner formed by the intersection of two planes of the wall surface; the recess portion extends from one of said two planes to the other; in a plane parallel to the tread surface of the recess block, the recess portion has a substantially arc-shaped cross section and an interior angle of an intersection of the substantially arc-shaped recess portion and said wall surface is less than 120 degrees and at least 70 degrees; the recess portion has a width of at least 1.0 mm and at most 6.0 mm at the tread surface of the recess block; and the depth of the recess portion is at least 1.0 mm and at most 4.0 mm, and wherein said plurality of blocks are crown blocks the centroids of the tread surfaces of which are located in a crown region of the tread portion defined as centered on the tire equator and having an axial width of 40% of the width of said tread portion of the tire, and shoulder blocks the centroids of the tread surfaces of which are located in a pair of shoulder regions of the tread portion axially outward of said crown region, and the recess portions are provided in only said shoulder blocks.