| 摘要 |
PURPOSE: To avoid a puncture failure even when a stone biting phenomenon is cause in a lug groove by providing the lug groove in the tread central area of a tread part, and arranging a slant cord layer or a wire layer between a carcass and a parallel cord layer in such a manner that a slant arrangement cord or wire crosses the lug groove. CONSTITUTION: A belt has a rubber covered slant cord layer 6a or rubber coated slant wire layer having a slant arrangement of steel cord or steel wire to the tire equatorial surface E of a tread part; and a rubber coated parallel cord layer having a cord arrangement substantially parallel to the equatorial surface E. The slant cord layer 5a is arranged between the parallel cord layer and a carcass, a lug groove 10 is provided in the center area of a tread 3t, and the slant cord layer 6a is formed in such a manner that a steel cord 16ac of slant arrangement crosses the lug groove 10. Thus, a sufficient tire strength can be provided to effectively solve the puncture by stone biting apt to occur in the lug groove 10. |
