| 摘要 |
PROBLEM TO BE SOLVED: To improve uneven wear resistance by regulating a slice-cut cross section of a belt ply.SOLUTION: A belt layer 7 comprises first and second belt plies 7A and 7B of radially inner and outer sides, and regulates a shape of the slice-cut cross section 7S. The slice-cut cross section 7S is formed when an outer surface of the second belt ply 7B in a tire of a normal pressure state is virtually slice-cut by a slice surface 20 orthogonal to a tire equatorial plane Co and passing through an outer edge Be of the second belt ply 7B. The regulation is as follows. A ratio L0/L80 is 1.22 to 1.44, and a ratio L80/L95 is 1.8 or less, wherein L80 is a length in a circumferential direction at a position of 0.80 times a cut cross section half width W, L95 is a length in the circumferential direction at 0.95 times, and L0 is a length in the circumferential direction on the tire equatorial plane. |
