| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire capable of effectively preventing the breakdown of a side wall portion during low air traveling. SOLUTION: In the pneumatic tire, a splice portion 12d of a carcass member 12 is formed to make the tire circumferential direction length of a part 12b corresponding to the side wall portion 2 shorter than the tire circumferential direction length S2 of a part 12c corresponding to a tread portion 1, so that splice amount on the side wall portion 2 side can be made less than that on the tread portion 1 side. Therefore, stiffness changes in the tire circumferential direction is suppressed, and bending amount can be made uniform. Therefore, concentration of stress to the splice portion 12d of the side wall portion can be reduced during run-flat traveling. Consequently, the occurrence of the breakdown of the side wall portion 2 from a reinforcing cord 12a of the splice portion 12a can be effectively prevented, and long distance traveling performance during run-flat traveling can be improved. COPYRIGHT: (C)2008,JPO&INPIT
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