Patent ID: 6736174
Filing Date: 2004-05-18
Classification: B60C,Y10T

Abstract:
A pneumatic tire comprising:tread portion constituted with a tread rubber layer and including grooves formed at a radially outer tread surface; and a thin tread reinforcing layer provided at a position, in the thickness direction, of the tread rubber layer so as to be situated above bottoms of the grooves and extend over at least one portion of the tread rubber layer in the tire widthwise direction thereof, the tread reinforcing layer being composed of a material having larger tensile modulus of elasticity than that of a rubber composing the tread rubber layer, wherein the tread rubber layer is made up of a plurality of rubber layers stacked in the tire radial direction, each of the plurality of rubber layers having different physical properties, and the thin tread reinforcing layer is embedded in the outermost rubber layer in the tire radial direction.