Vehicle tires with low absorption of horse-power

Claim 1

A tire for a vehicle wheel with a carcass comprising radial cords, two sidewalls spaced apart a maximum distance, which, in the axial sense, determines the width of the tire section, two bead-heels each one of which comprises at least one bead-core around which are turned-up, from the inside towards the outside, the ends of the cords of the carcass, a tread-band disposed on the crown of the carcass, and an annular reinforcing structure that is circumferentially inextensible, interposed between said tread-band and said carcass, said annular reinforcing structure having a width that is substantially equal to that of said tread-band and comprising two radially overlapped layers of rubberized fabric reinforced with metallic cords, said metallic cords being parallel to each other in each layer and crossed with the cords of the facing layer and inclined at an angle of between 5° and 30° with respect to the equatorial plane of the tire, the reciprocal distance between the centers of two facing cords, on the plane of a cross-section of the tire, being not larger than 1 mm throughout the entire width of said annular reinforcing structure, said tire being characterized by the fact that said metallic cords are twisted strands made from at least three individual wires with a diameter of 0.12 to 0.25 mm, the diameters of said metallic cords being not larger than 0.603 mm, and being distributed in each layer with a density greater than 60 cords per decimeter.