| 摘要 |
PROBLEM TO BE SOLVED: To provide a run flat tire capable of attaining light weight of the run flat tire and reduction of rolling resistance while maintaining run flat durability. SOLUTION: In the run flat tire having a belt layer arranged at an inner side in a tire radial direction of a tread part; and a side reinforcement layer arranged at an inner side in a tire radial direction of a side wall part and having a shape in a cross section in a tire width direction of a crescent shape, the belt layer comprises a steel cord layer in which a cord comprising a plurality of steels arranged in parallel so as to be inclined to a tire equator line by 20-34°are covered with a rubber; and a helically wound belt layer arranged at an outer side in a tire radial direction of the steel cord layer and having a cord helically wound in a tire circumferential direction covered with a rubber. COPYRIGHT: (C)2007,JPO&INPIT
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