| 摘要 |
PURPOSE:To improve the confined-sound suppressing performance and the vibration absorbing performance by constituting the rubber of a sidewall part from a rubber part having the outside-breakage resistance and the weatherproofness and a rubber part having a large hysteresis loss which is arranged within a specific range in the radial direction. CONSTITUTION:A sidewall part SW is constituted of a rubber part A having outside-breakage resistance and weatherproofness and a rubber part B made of at least two kinds of polymers out of the rubber having a large hysteresis loss such as natural rubber, butadiene rubber, styrene.butadiene rubber, chlorinated buthyl rubber and ethylenepropylene diene terpolymer. The rubber part B is arranged in the radial direction, and in band form in the circumferential direction within a range of 0.21-0.74 of the height H on the sectional surface of a tire. With such constitution, the confined-sound absorbing effect and vibration absorbing effect can be improved. |
