| 摘要 |
A pneumatic tire has a rubber member at least partially constituting a tread portion, which member is formed of at least two layers of an outer layer on a tire surface side and an inner layer on a carcass side. A blended amount (X) of an antioxidant in the outer layer is in a range of 0.4-1.6 weight % of an entire composition, and the blended amount (X) of the antioxidant in the outer layer and a blended amount (Y) of the antioxidant in the inner layer satisfy the expression: Y>=-0.4 X<SUP>2</SUP>+2X. Thus, a pneumatic tire suffering less rubber degradation and alleviated in discoloring of the tire surface in prolonged use is provided.
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