| 摘要 |
<p>Fatigue breakdown of reinforcing cords embedded in a pair of folded reinforcing layers wrapping around an end of a belt layer in the width direction of a tire based on repeated compressive forces. In a pneumatic tire mounted on a drive wheel, the reinforcing cords embedded in an inner portion which is spaced away from the belt reinforcing layer among the inner portion and an outer portion of the pair of the folded reinforcing layers are inclined forward in the rotating direction of the tire from an widthwise inner end of the inner portion toward a folded portion, thereby preventing fatigue breakdown even if the reinforcing cords composed of aromatic polyamide fibers vulnerable to a compressive force are subjected to a tensile force when a driving force is applied to the pneumatic tire.</p> |
