| 摘要 |
PROBLEM TO BE SOLVED: To enhance operation stability while maintaining crack growth-resistance or the like in a side wall part. SOLUTION: A side wall rubber 10 comprises an inner layer part 13 on a carcass 6 side and an outer layer part 12 on an outer side surface 3S side. The 100% modulus MB of the inner layer part 13 is made larger than 1.0 times the 100% modulus MA of the outer layer part 12 and smaller than 1.5 times that and the 100% modulus MC of a clinch rubber 11 forming a bead outer skin is made 1.5 times to 4.0 times the 100% modulus MA. Thickness TB of the inner layer part 13 is made 0.3 times to 0.8 times the total thickness T0 of the side wall rubber 10. COPYRIGHT: (C)2006,JPO&NCIPI
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