| 摘要 |
PURPOSE:To reduce track abrasion, and to improve anti-wettability and gripping function by forming zigzag out-corner and in-corner on the groove bottom of a main groove on a tread surface, and by forming a slot and siping on a slope groove wall of an angle protrusion of the main groove. CONSTITUTION:A tread surface 2 is recessed, and multiple main grooves 4 that repeat out-corner M and in-corner V in a zigzag mode on a groove bottom 3, is arranged on a tire. Edges V1, M1 on the groove on both inner and outer sides extended in linear on the tread surface 2 slightly separated from the in-corner V and the out-corner M, are linked together in turn, so as to form the main groove 4. An angle protrusion 6 provided with a slope groove wall 5 extended to the edge M1 on the outer side groove on the tread surface 2 from the out-corner M of the groove bottom 3, is formed on the main groove 4. A slot 9 provided with a back wall 10 that is gradually widened in its depth DS downward at a width Hs of 3-6mm, as well as siping 11 provided with a back wall 12 that is gradually widened in its depth DC downward from the back wall 10, on the angle protrusion 6. |
