| 摘要 |
PROBLEM TO BE SOLVED: To provide a run-flat tire that excels in durability at run-flat travel. SOLUTION: The run-flat tire comprises a main belt 8 composed of at least two bias belt layers 7a and 7b having parallel arrangements of cords extending in a bias relation to a tire center plane E on an outer circumference side of a crown portion 6 of a carcass 5, a tread part 9 reinforced by the main belt 8, buttress parts 11 positioned at both ends of the tread part 9, sidewall parts 12 interconnecting the buttress part 11 and a bead part 2, and reinforcing rubber layers 13 arranged on an inner side of the carcass 5 at least along the sidewall part 12, composed of relatively hard rubber and having a substantially crescent sectional form. A ringed flexion-suppressing reinforcing layer 14 extending along the same circumference is arranged on an outer circumference of the carcass 5 at least along the buttress part 11.
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