| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic radial tire capable of improving driving stability without any deterioration in rolling resistance. SOLUTION: In a component member of a bead part, a material with a ratio E1/tanδof storage elasticity E1 at 60°C to a loss factor tanδis 50-500 and a storage elasticity E1 of 8 Mpa or more at 60°C is used for a rim cushion at least. COPYRIGHT: (C)2004,JPO
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