Patent ID: 6578612
Filing Date: 2003-06-17
Classification: B60C,Y10S,Y10T

Abstract:
A pneumatic radial tire, comprising:five main grooves provided on a tread and extending in a tire circumferential direction to divide the tread into six rows of land portions; and a plurality of subgrooves provided on the tread and extending in a tire width direction to divide each of the land portions into a plurality of blocks, wherein the tread consists of six block rows including a first block row at each shoulder side, a second block row adjacent to the first block row toward a center side and a third block row adjacent to the second block row toward the center side; wherein an area ratio of the blocks of the first block row to the blocks of the second block row to the blocks of the third block row is set at a relationship of 1:0.9 to 1.1:1.8 to 2.2 in a region between ends of a belt layer having a maximum width embedded in the tread; and wherein the ratio of a groove area to a tread area is set within the range of 15% to 35%.