PNEUMATIC TIRE

PURPOSE:To improve partial wear resistance property with keeping durability at high speed by instituting the radius of curvature of a inside wall in the axial direction larger than that of an outside wall, in a continuous part from the side wall of a groove in the circumferential direction to the groove bottom in a tread. CONSTITUTION:The tread part T of a tire is provided with a plurality of circum ferential grooves 1-1 - 1-4 respectively on both sides of a circumferential main groove 1 in parallel with the groove 1, hereby, a plurality of land parts 2-1 - 2-6 are divided. A plurality of lateral grooves 3 are arranged in the crossing direction with respective circumferential grooves 1-1 - 1-4, hereby respective land parts 2-1 - 2-6 are divided into a plurality of blocks. In the above-stated constitution, for example in the section of a first circumferential groove 1-1, where the radius of curvature of the continuous part from the side wall 4-1 on the inside in the axial direction to the groove bottom 5 is R1 and the radius of curvature of the continuous part from the side wall 4-2 on the outside in the axial direction to the groove bottom 5 is r1, the relation R1>r1 is instituted.