| 摘要 |
In a pneumatic tire composed of a carcass layer crossing between a pair of left and right bead cores, the bead cores comprise a fastening bead core for fastening an end of the carcass layer to be turned up around the fastening bead core, and a non-fastening bead core free from the end of the carcass layer. An inner circumferential radius R<SUB>2 </SUB>of the non-fastening bead core is set smaller than an inner circumferential radius R<SUB>1 </SUB>of the end of the carcass layer to be turned up around the fastening bead core.
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