Patent ID: 7191812

Claim:
A pneumatic tire, comprising a carcass including a carcass ply having a ply body portion which extends from a tread portion to a bead core of a bead portion through a sidewall portion and which is continuously provided with a ply folded-up portion folded up around the bead core from its inner side to its outer side in the tire axial direction, and a bead apex rubber passing between the ply body portion and the ply folded-up portion and extending radially outward of the tire from a radially outer surface of the bead core, wherein the bead core has radially inner and outer surfaces, and axially inner and outer surfaces, the bead portion is provided with a bead reinforcing layer having an inner portion, a bottom portion and an outer portion wherein the inner portion extends along the axially inner surface of the bead core, the bottom portion extends along the radially inner surface of the bead core, and the outer portion extends along the axial outer surfaces of the bead core, and the bead reinforcing layer has reinforcing cords arranged therein at an angle of 20 to 60° with respect to a tire circumferential direction, the outer portion of the bead reinforcing layer includes a main portion which extends radially outward of the tire beyond the radially outer surface of the bead core to a region adjacent to the bead apex rubber, and a folded-back portion which is folded back at a radially outer end thereof and terminates radially inward of the radially outer surface of the bead core, the inner portion of the bead reinforcing layer passes between the bead core and the ply body portion, and the outer portion passes between the bead core and the ply folded-up portion, and the ply folded-up portion of the carcass ply has a radial height larger than the radial height of the bead apex rubber, and the end portion thereof, extends radially outward of the tire beyond the bead apex rubber to be adjacent to the ply body portion of the carcass ply so as to wrap around the bead apex rubber.