Patent ID: 6889736
Filing Date: 2005-05-10
Classification: B60C,Y10T

Abstract:
1. A pneumatic tire comprising: a carcass of one or more rubberized plies of radially arranged cords toroidally extending between a pair of bead cores embedded in respective bead portions and reinforcing a pair of sidewall portions and a tread portion, a belt of two or more steel cord cross layers disposed on an outer periphery of the carcass to reinforce the tread portion, and a run-flat reinforcing rubber layer arranged in at least a part of a zone ranging from a position near to the bead portion through the sidewall portion to a shoulder region of the tread portion, wherein the belt has end portions at both shoulder regions of the tread portion; at least one cushion rubber layer is provided between mutually adjacent end portions of two of the at least two steel cord cross layers constituting the belt; and the at least one cushion rubber layer has a loss tangent (tan δ) lower than a loss tangent of rubber for coating cords of the carcass.