| 摘要 |
PROBLEM TO BE SOLVED: To promote weight reduction while improving stability and controllability as well a riding comfort. SOLUTION: A topping rubber 11 of an inner carcass ply 9i located on the tire inner side, only a rubber inner portion 11i forming a tire inner surface HS is composed of butyl rubber or butyl type rubber containing its inductive body of 10 or more wt parts. A belt layer is composed of at least two belt plies including a monofilament belt ply, with monofilament cord arranged aslope 10 to 40 degrees with respect to the tire circumferential direction, and a non- monofilament belt ply, with non-monofilament cord arranged in the same way.
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