Agricultural vehicle tire carcass reinforcement

A tire for a heavy vehicle of a self-propelled agricultural type, comprising:

• a tread, of width A, connected by way of two sidewalls to two beads configured to provide a mechanical connection to a rim, of width L;
• a reinforcement comprising a crown reinforcement, radially on an inside of the tread, and a carcass reinforcement, radially on the inside of the crown reinforcement;
• wherein the carcass reinforcement comprises at least two turned-up carcass layers and at least two non-turned-up carcass layers;
• wherein each said turned-up carcass layer includes mutually parallel reinforcing elements and comprises a main part wrapped, in each said bead, from the inside of the tire towards an outside around a bead wire, of diameter D, so as to form a turn-up of which an end is positioned radially on the outside of a radially outermost point of the bead wire at a radial distance;
• wherein each said non-turned-up carcass layer includes mutually parallel reinforcing elements, an end of which is positioned at a radial distance from the radially outermost point of the bead wire, and each non-turned-up carcass layer is not wrapped around any portion of any bead wire;
• wherein a meridian section of the tire has, in a meridian plane passing through a rotation axis of the tire, a section height H and a section width S;
• wherein, in each sidewall portion of the tire, a sequence of carcass layers from the outside of the tire to the inside of the tire comprises a turn-up of a first turned-up carcass layer, a first non-turned-up carcass layer, a turn-up of a second turned-up carcass layer, a second non-turned-up carcass layer, a main portion of the second turned-up carcass layer, and a main portion of the first turned-up carcass layer;
• wherein the radial distance between the end of the turn-up of each turned-up carcass layer and the radially outermost point of the bead wire is at least equal to 0.5 times the section height H of the tire, and wherein the radial distance between the end of each non-turned-up carcass layer and the radially outermost point of the bead wire is at most equal to the diameter D of the bead wire.