| 摘要 |
PURPOSE:To improve grip performance for dry and wet roads by extending transverse main grooves for forming inner block rows aslant and downwards toward the insides in the width direction of treads, and extending the transverse main grooves for forming outer block rows in the shape of an angle. CONSTITUTION:In the wheel tread portion 2 of treads 1, multiple transverse main grooves 3-6 are extended linearly respectively in the peripheral direction of a tire, whereas multiple transverse main grooves 21 extending aslant and downwards toward the inside in the width direction of treads 1 are disposed to form block rows 22, in a ring type land portion formed by main grooves 3 in peripheral direction. In the ring type land formed by main grooves 6 in a peripheral direction, multiple bent transverse main grooves 25 that bend in angle shapes on the way to reach tread edges are disposed. By this means, the portions more inside from the bent points K of respective bent transverse main grooves 25 are inclined in a direction opposite to respective transverse main grooves in relation to the peripheral direction of a tire, and outside portions are inclined in the same direction as that of respective transverse main grooves 21. |
