A tire comprising at least one carcass-type reinforcing structure formed of at least one layer of mutually parallel reinforcing elements making an angle, with the circumferential direction, of strictly less than 75° at least in the region of maximum axial width of the tire and of strictly less than 65° at least in the equatorial plane anchored on each side of the tire to a bead, each bead extending radially outwards in the form of a sidewall, the sidewalls radially towards the outside meeting a tread, and comprising, under the tread, a crown reinforcing structure consisting of at least one layer of reinforcing elements making angles of between 10° and 60° with the circumferential direction and known as a working layer, radially on the outside of the carcass-type reinforcing structure. In sidewalls, the tire comprises at least two axially adjacent carcass reinforcing layer portions, the reinforcing elements of the said carcass reinforcing layer portions being directed on each side of a meridian plane, at least in part of the sidewalls, and the reinforcing elements of at least one working layer crossing the reinforcing elements of the carcass-type reinforcing structure at an angle greater than 40°.