Patent ID: 7604032

Claim:
A pneumatic tire comprising a tread portion, a pair of sidewall portions, a pair of bead portions with a bead core therein, and a carcass ply extending between the bead portions through the tread portion and sidewall portions, and wound around the bead core in each said bead portion from the axially inside to the axially outside of the tire so as to form a pair of wound portions and a main portion therebetween, wherein said bead core has a cross sectional shape elongated in a direction substantially parallel to the bottom of the bead portion so that the width (WC) thereof measured in said direction is in a range of 1.5 to 2.5 times the height (HC) thereof measured perpendicularly to said direction, and the bead core is covered with a reinforcing rubber layer made of a high modulus rubber having a complex elastic modulus E*1 of from 30 to 100 Mpa and a substantially constant thickness t 1 of from 0.5 to 3.0 mm, and the resultant space in each said bead portion formed between the wound portion of the carcass ply and the reinforcing rubber layer is filled with a filler rubber having a complex elastic modulus E*2 less than the complex elastic modulus E*1 of the reinforcing rubber layer.