Abstract: A tire with radial carcass reinforcement, having a crown reinforcement embodying at least two working crown plies formed of inextensible cables, crossed from one ply to the next, forming angles of between 10° and 45° with the circumferential direction, characterized in that, in the absence of any ply formed of inextensible cables forming an angle greater than 45° with the circumferential direction, an additional, axially continuous, ply formed of undulating metallic elements oriented substantially parallel to the circumferential direction is placed radially between the working plies.

Abstract: A tire having an Heterologous/S form ratio of at least 0.50, having a rad carcass reinforcement (1) and crown reinforcement (3) composed of at least two working crown plies (31,33) made of inextensible metal cables, crossed from one ply to the next, forming angles of between 10.degree. and 45.degree. with the circumferentail direction, and of an additional ply (32) which is axially continuous and formed of metallic elements oriented substantially parallel circumferential direction. Said ply (32) over the working ply (31) radially closest carcass reinforcement (1,) and the ratio of its rigidity of extension per unit of width to the total of the rigidities of extension of the other plies of the crown reinforcement being between 0.35 and 0.70.

Abstract: A tire with radial carcass reinforcement 1, having a crown reinforcement 3 aving at least two working crown plies 32, 34 made of inextensible cables, crossed from one ply to the other and forming angles of between 10.degree. and 45.degree. with the circumferential direction, characterized in that in the absence of any ply formed of inextensible cables forming an angle greater than 45.degree. with the circumferential direction, an additional, axially continuous, ply 33 formed of metallic elements oriented substantially parallel to the circumferential direction, is placed radially between the working plies 32, 34, having an axial width L.sub.33 at least equal to 1.05 times the axial width of the widest working crown ply L.sub.32, L.sub.34.