| 摘要 |
PURPOSE: To increase road surface frictional force by providing a siping, which slants in the reverse direction to the tire rotating direction, in a projection bar body on a shoulder when a tread surface is sectioned imaginarily into a center tread surface area within the predetermined distance in the tread surface width direction of a tire equator and a shoulder tread surface area. CONSTITUTION: On the surface of a tread part, 5, a longitudinal main groove G extending in the tire circumference direction and a lateral groove Y extending in the direction crossing the longitudinal groove G are arranged. On a tread surface S, a plurality of projection bar bodies 10 consisting of block rows, in which ribs or blocks extending in the tire circumference direction are arranged in the tire circumference direction, are formed. When the tread surface S is divided imaginarily into a center tread surface area S1 within a distance L, which is a quarter of the tread surface width W, of a tire equator C and a shoulder tread surface area S2 on the outside in the tire axis direction, a siping 11 is arranged in the center projection bar body 10A arranged in the center tread surface area S1, while a siping 12 is arranged in the projection bar body 10B arranged in the shoulder tread surface area S2. |
