Tire for heavy transport vehicles, the crown reinforcement of which has thermocontractable circumferential cables and process for manufacturing same

A tire for aircraft, intended to support heavy loads and inflatable to high pressure, having a tread, a radial carcass reinforcement anchored to at least one bead ring in each bead and a crown reinforcement formed of at least two superimposed plies of extensible circumferential textile cables which is arranged radially outwards of the radial carcass reinforcement, characterized by the fact that the cables of the circumferential cable plies closest to the radial carcass reinforcement form an angle of 0.degree..+-.2.5.degree. from the circumferential direction of the tire, have a relative extensibility upon rupture of at least 8%, preferably between 10% and 26%, when the vulcanized tire is mounted on its service rim, but not yet inflated, and a relative contraction under the effect of the heat at the temperature of vulcanization of at least 1.25%, preferably between 2% and 8%.