Tire crown reinforcement

A track tire with radial carcass reinforcement, having a crown reinforcement comprising at least two working crown plies made up of inextensible wire reinforcing elements, crossed from one ply to the next by forming angles with the circumferential direction ranging between 10° and 60°, and an axially continuous additional ply, the additional ply being placed between radially adjacent ones of the at least two working crown plies and being made up of wire reinforcing elements of greater diameter than that of the reinforcing elements of the radially adjacent ones of the working plies and having an axial width equal to at least 50% of the maximum axial width of the carcass reinforcement, wherein the reinforcing elements of the additional ply are steel and are corrugated in the plane of the ply, the corrugations being parallel to one another, in phase and oriented parallel to the circumferential direction, so that the ratio of amplitude to wavelength of the corrugated elements decreases axially from the center to the edges of said additional ply, reaching a minimum at said edges, and in which the crown reinforcement further includes a protection ply, radially situated above the radially-outermost working crown ply, and comprising straight elastic steel wire cords, circumferentially oriented at an angle α in the same direction as an angle β of the elements of the radially-outermost working crown ply, and the axial width of the protection ply is equal to at least the axial width of the additional ply.