REINFORCED LIGHTWEIGHT TYRE

Tire with a maximum axial width SW and axial width RW at the beads, comprising a crown reinforcement of width TW and a radial carcass reinforcement, in which Tire, when it is fitted onto its mounting rim and inflated to its service pressure and equilibrium, the following conditions are satisfied: TW/SW 75%, TW/RW 85% and X/SH 50%, where X is the radial height at which the Tire has its maximum axial width and SH denotes the radial height of the Tire; Y/SH 80%, where Y is the radial height of the carcass reinforcement at the end of the crown reinforcement; and Z/SH 90%, where Z denotes the radial height of the carcass reinforcement, wherein the absolute value of the angle α between the tangent to the carcass reinforcement at the points on the carcass reinforcement having the same axial positions as the axial ends of the crown reinforcement and the axial direction is less than or equal to 22°, and wherein each of the sidewalls comprises at least two crossed reinforcing members.