Patent ID: 8091600
Filing Date: 2012-01-10
Classification: B60C,Y10T

Abstract:
1. A heavy duty pneumatic tire in which two inside narrow-width belt layers and one or more outside wide-width belt layers, which have a larger width than the narrow-width belt layers, are sequentially disposed in the outer periphery side of a crown area of a radial carcass, wherein a width of the inner narrow-width belt layer is adapted to have a larger width than that of the outer narrow-width belt layer, each of the narrow-width belt layers and the one or more wide-width belt layers comprise a plurality of beltcords, and the beltcords of the two narrow-width belt layers are adapted to have a smaller intersection angle with respect to a tire equatorial plane than that of the beltcords of the one or more wide-width belt layers, wherein the beltcords of the narrow-width belt layers are adapted to extend in a direction so as to intersect with each other between the layers, and a portion of the one or more wide-width belt layers, which is situated adjacent to the outer periphery side of the two narrow-width belt layers, corresponding to a side-edge vicinity of the outer narrow-width belt layer, is formed to be convex in a radially outward direction toward an outer surface of the pneumatic tire with respect to a line extending parallel with a central axis line of the tire and in contact with an inner peripheral surface of the wide-width belt layer at a position at a distance in the tire width direction of 0.1 times the width of the outer narrow-width belt layer from the equatorial plane, and wherein the rubber thickness B