| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a pneumatic radial tire suppressing failures at a carcass folded end part and at a tire radial direction outside end part of a reinforcing layer. <P>SOLUTION: At least a reinforcing layer 9 in which an organic fiber cord or a metal cord is coated with a rubber material is provided at the tire width direction outside of the carcass folded end part 6a. In a non-load state of the tire in which the tire is mounted on a normal rim and normal internal pressure is filled, the reinforcing layer 9 includes a first reinforcing part 9a which is located nearer the tire radial direction outside than the carcass folded end part 6a and at a tire radial direction outermost part of the reinforcing layer 9, and a second reinforcing part 9b which is arranged in a region in the vicinity of the carcass folded end part 6a and includes a tire radial direction position including at least the carcass folded end part 6a. The first reinforcing part 9a and the second reinforcing part 9b are adjacent to each other or overlapped with each other. A cord angleαformed by the organic fiber cord or the metal cord of the first reinforcing part 9a in relation to a tire peripheral direction and a cord angleβformed by the organic fiber cord or the metal cord of the second reinforcing part 9b in relation to the tire peripheral direction satisfyαis less thanβ. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
