Pneumatic tire

摘要

To provide a pneumatic tire wherein the lightweight properties of a tire is secured while improving the plunger energy and BES resistance thereof, which is particularly suitable for tires for a large passenger car or extra load tires.;A pneumatic tire comprising a carcass 1 as a skeleton, and at least two belt layers 2a, 2b 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 is provided. The steel cord is composed of two or more core wires and five to seven sheath wires twisted together around the core wires; the interval between adjacent steel cords in the belt layer is more than 1.0 mm and not more than 1.50 mm; and the gauge of the belt layer is not less than 1.20 mm and not more than 1.60 mm.

主权项

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.