Patent ID: 7066229

Claim:
A pneumatic tire, comprising a carcass extending between bead portions through a tread portion and sidewall portions, said carcass comprising at least one ply of carcass cords extending between the bead portions, each said carcass cord being made up of seven to twelve metallic filaments whose diameter is in a range of from 0.15 to 0.30 mm, said seven to twelve metallic filaments being grouped into a plurality of elements, said plurality of elements being one filament and bunches of two or three or four filaments, said plurality of elements being twisted at a twist pitch PC of from 10 to 25 mm, each bunch including at least one waved filament and at least one unwaved filament, the filaments in each said bunch being twisted at a twist pitch Pf of from 3 to 20 times the twist pitch PC, and the waved filament being two-dimensionally waved at a wave pitch and wave height before being twisted, wherein the wave pitch is in a range of from 5.0 to 30.0 times the diameter of the filament, and the wave height is in a range of from 0.5 to 4.0 times the diameter of the filament.