| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire in which fitting pressure is reduced, while maintaining fastening force of a bead wire, and working efficiency in rim assembly and durability of a bead part are improved.SOLUTION: In a pneumatic tire 1, a bead core 5 is arranged in a bead part 4. The bead core 5 includes a first bead wire 9A, and a second bead wire 9B in which an elongation α shown in formula (1) is larger than the first bead wire 9A. At least one second bead wire 9B is arranged at the innermost side in the tire radial direction. The elongation α(%)=&Dgr;L/L×100... (1), where L is a bead wire length when no load is applied, and &Dgr;L is an elongation amount when a unit load is applied. |
