Patent ID: 6708747
Filing Date: 2004-03-23
Classification: B60C,Y10T

Abstract:
A pneumatic radial tire comprising; a carcass toroidally extending between a pair of bead portions and comprised of at least one rubberized ply containing a plurality of cords arranged substantially in a radial direction, a belt arranged at an outside of the carcass in the radial direction and comprised of at least two belt layers containing plural cords embedded therein, the cords of said belt layers being crossed with each other with respect to an equatorial plane of the tire, a belt reinforcing member arranged inside the belt in the radial direction and comprised of at least one belt reinforcing layer and a tread rubber arranged outside the belt in the radial direction, a widthwise outer end of a belt reinforcing layer having a widest width among the belt reinforcing layers is located outward from a widthwise outer end of a belt layer having a widest width in a widthwise direction of the tire, and wherein when a maximum width of the carcass is L, the widthwise outer end of the widest-width belt reinforcing layer is located between a point P separated outward from the equatorial plane S by 0.375 times of L in the widthwise direction and a point Q separated outward from the equatorial plane S by 0.45 times of L in the widthwise direction, and said at least one belt reinforcing layer comprises a reinforcing element embedded therein and extending in a circumferential direction while having a wave or zigzag form.