Patent ID: 9259970
Filing Date: 2016-02-16
CPC Classification: B60C,Y10T

Claim Text:
1. A pneumatic tire for heavy load comprising: a carcass extending from a tread portion through a sidewall portion to a bead portion; a belt layer disposed on the radially outside of the carcass and inside the tread portion; and a belt cushion disposed between the tire-axis-direction end of the belt layer and said carcass, said tire-axis-direction end of said belt layer is covered with an edge cover made of a rubber composition A and said belt cushion comprises four layers including an outer layer, an interlayer, an inner layer, and an innermost layer, which are arranged in this order inwardly in the tire-radial-direction from the tire-axis-direction end of said belt layer, said outer layer and said inner layer are made of a rubber composition B having complex modulus E*b and loss tangent tan δb, said interlayer is made of a rubber composition C having complex modulus E*c being substantially the same as said complex modulus E*b and having loss tangent tan δc being smaller than said loss tangent tan δb, and said innermost layer is made of a rubber composition D and is disposed between said inner layer and said carcass.