Patent ID: 6412534
Filing Date: 2002-07-02
Classification: B60C,Y10T

Abstract:
A recapped pneumatic radial tire comprising; a pair of bead portions, a pair of sidewall portions, a tread portion extending between both sidewall portions, said tread portion having tread rubber, said tread rubber comprising exclusively that part of said radial tire that is recapped, a carcass of one or more rubberized cord plies of radial cord arrangement extending between a pair of bead cores embedded in the bead portions to reinforce the bead portions, sidewall portions and tread portions, and a belt reinforcing the tread portion on an outer circumference of the carcass, said belt having at least two rubberized steel wire element layers, in which an outermost belt layer is an outermost slant element layer containing the steel wire elements obliquely arranged with respect to an equatorial plane of the tire; at least one belt layer of the belt being located inward from the outermost slant element in a radial direction of the tire and being a circumferential element layer containing the steel wire elements arranged substantially in parallel to the equatorial plane; a coating rubber for the steel wire elements in the outermost slant element layer has a modulus of elastically at compression of not less than 200 kgf/cm2; and a sum of the cross-sectional area of the steel wire elements in the at least one circumferential element layer per unit length measured in a direction perpendicular to the extension of the steel wire elements in each of the belt layers is larger than a sum of the cross-sectional area of the steel wire elements in the outermost slant element layer per the same unit length, wherein the sum of the cross-sectional area is defined by: nÃ—aÃ—ZÃ—N in mm2 where n is the number of steel filaments, a is the cross-sectional area of one steel filament, Z is the number of steel wire elements per unit length and N is the number of layers.