Patent ID: 6802351
Filing Date: 2004-10-12
Classification: B60C,Y10T

Abstract:
In a pneumatic tire comprising a tread portion, a pair of sidewall portions and a pair of bead portions and a carcass toroidally extending between a pair of bead cores embedded in the respective bead portions and comprised of at least one rubberized carcass ply containing at least one steel cord therein, in which the carcass ply has a wound portion which is wound around the bead core from an inside of the tire toward an outside thereof and said wound portion has a terminal end in the vicinity of a main body of the carcass ply at an outer peripheral position of the bead core, wherein at least one steel cord reinforcing layer is arranged in the bead portion, and at least one reinforcing layer located inside in a widthwise direction of the tire among the at least one steel cord reinforcing layer is arranged along the main body of the carcass ply and is continuous to turnup around the bead core from the inside toward the outside in the widthwise direction, and a terminal end of the at least one reinforcing layer located outside in the widthwise direction is arranged away from the terminal end of the carcass ply, wherein the main body of the carcass ply is sandwiched between the at least one reinforcing layer and another reinforcing layer in a thickness direction thereof.