| 摘要 |
PROBLEM TO BE SOLVED: To enhance the trend of getting over a projection by enhancing the shock absorbing performance without impairing the maneuvering stability. SOLUTION: A pneumatic tire is furnished in its bead part 4 with a retaining surface S1 extending in contact with the tire cavity side inner surface of a ply body part 6a of carcass 6, and the retaining surface S1 is furnished with a reinforcing rubber layer 10 approximately in a crescent shape curving in an arc of circle having center on the tire cavity side. When the tire is in the regular internal pressure condition, the ply body part 6a lies alongside the retaining surface S1 and curves smoothly in a circular arc having the center on the tire cavity side in the region Y of 90% or more of the range from the carcass maximum width point Pm to the segregation starting point Pe from the bead core 5. COPYRIGHT: (C)2007,JPO&INPIT
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