| 摘要 |
The following tire is provided: a pneumatic tire in which steering stability is securely prevented from being varied due to changes in running speed or ambient temperature. The pneumatic tire includes a tread part 1, sidewall parts 2, bead parts 3, a carcass layer 5 including at least one carcass ply, bead fillers 8, belt layers 6 each including at least one belt ply, and at least one belt-protecting layer 7. The carcass layer includes at least one carcass ply cord. The difference between the heat shrinkage stress of the carcass ply cord at 30° C. and that of the carcass ply cord at 80° C. is 3.0×10−2 cN/dtex or more. The reduction rate of the 30-80° C. dynamic storage elastic modulus E′ of rubber used to form the bead fillers 8 is 5% or more.
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