| 摘要 |
A pneumatic radial tire comprises a pair of bead portions (1), a pair of sidewall portions (2), a tread portion (3), a radial carcass (4), and a belt (6), in which the tread portion (3) is comprised of a first tread zone (7) contacting with a flat road surface and a second tread zone (8) projecting toward the side of the first tread zone and contacting with a side of a slant road surface. A half-width (TW1) of the first tread zone (7) and a width (TW2) of the second tread zone (8) satisfy TW2/TW1 > 2.0 x 10 <-2>. Further, fine grooves (10) are arranged in at least one of both side end vicinities of the first tread zone (7) so that a widthwise opening center (Gc) of the fine groove (10) is located within a range of 0.8TW1 to 0.9 (TW1+TW2) separated from the equatorial plane (O) of the tire toward the side end of the first tread zone (7). <IMAGE> |
