| 摘要 |
PROBLEM TO BE SOLVED: To improve durability of a bead part by preventing failure between a hard rubber part and a carcass body of a stiffener at the load acting time in a pneumatic tire having a WIND bead structure. SOLUTION: A bottom face width w and a height h1 of a hard rubber part 28 of a stiffener 18, and a height h2 of the stiffener are set properly, so as to optimize bending rigidity of a bead part 12. Thereby, a falling deformation volume of the bead part 12 at the load acting time is reduced, so as to improve durability of the bead part 12. COPYRIGHT: (C)2007,JPO&INPIT
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