| 摘要 |
A pneumatic tire in which an improvement of durability more than ever is attained is provided. A pneumatic tire comprising at least one layer of carcass 1 which extends toroidally between at least one pair of bead cores, and 2 to 4 layers of belts 2 having a plurality of cords or filaments as reinforcing elements on the outer circumference of the carcass is provided. A pneumatic tire wherein 1 or 2 layers of the belts 2 is (are) employed as crown reinforcing layer(s) 3 formed by strips which are constituted by orienting a rubber steel cord complex along the tire circumferential direction;
the crown reinforcing layer 3 is divided into 3 parts which are a pair of outside strips 3a positioned at both sides of the tire width direction, and an inside strip 3b therebetween;
the breaking elongation (Eo) of steel cords of the outside strips and the breaking elongation (Ei) of steel cords of the inside strip satisfy the following formula: Eo > Ei ; and
the steel cords of the outside strips are straight, is provided. |
