Tire with double half-carcasses and low-profile crown reinforcements

A tire comprising at least one reinforcement structure of carcass type anchored on each side of the tire in a bead whose base is designed to be mounted on a rim seat, a crown reinforcement, each bead being extended radially towards the outside by a sidewall, the sidewalls meeting up radially towards the outside with a tread, the reinforcement structure extending circumferentially from the bead towards said sidewall, said reinforcement structure being discontinuous over at least a portion of the crown of the tire, said crown reinforcement comprising on the one hand at least one primary reinforcement structure covering substantially the entire width of the crown, said primary reinforcement structures being each divided into two separate zones forming on the one hand median portions of primary reinforcement structures and on the other hand lateral portions of primary reinforcement structures, disposed axially each side of the median portions, said median portions being disposed radially more to the inside than the lateral portions and junction zones ensuring connection of the radially spaced zones, and at least one substantially axial row of median circumferential reinforcements disposed radially to the outside, substantially adjacent the median primary reinforcement structure portion.