| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire that uses sidewalls excellent in weather and bending fatigue resistance and free from discoloration and crystallization. SOLUTION: The pneumatic tire uses sidewall rubber that has a two-layered structure consisting of an inner layer of rubber adjoining the carcass and an outer layer of rubber outside the inner layer rubber. The outer layer rubber comprises, as its rubber components, at least one type of unsaturated diene rubber selected from the group of natural rubber, polyisoprene rubber, styrene- butadiene rubber and polybutadiene rubber in an amount of 40 to 90% by weight, and rubber of a halogenated copolymer of isomonoolefin with a carbon number of 4 to 1 and para-alkylstyrene in an amount of 10 to 60% by weight.
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