Patent ID: 9211763
Filing Date: 2015-12-15
Classification: B60C,D07B

Abstract:
1. A pneumatic tire comprising at least one carcass extending toroidally between a pair of bead portions as a skeleton, and at least two belt layers each formed by rubberizing a plurality of steel cords arranged obliquely with respect to the tire circumferential direction on the outside in the tire radial direction of the crown portion of the carcass, wherein the steel cord is composed of two core wires and six sheath wires twisted together around the core wires; the interval between adjacent steel cords in each belt layer is not less than 1.09 mm and not more than 1.39 mm; and the gauge of the belt layer is not less than 1.22 mm and not more than 1.60 mm, in the steel cord, the wire diameter dc of the core wire differs from the wire diameter ds Of the sheath wire, and the ratio of the wire diameter ds of the sheath wire to the wire diameter dc of the core wire satisfies ds/dc>1.2.