Optimized Architecture of a Civil Engineering Tire

Radial carcass tire for a civil engineering vehicle, having two bead wires () of radial height Ht, and carcass reinforcement made of two layers, the first () being radially innermost with a radial height Hdc, is anchored in each bead to form a main part () and a turn-up (). The second layer () is radially outside the first layer (). The free end (A) of the turn-up () is at a radial distance from the radially outermost point () of the bead wire that is at least equal to 1 and at most equal to 2 times Ht. From the end A of the turn-up () to the point B at 85% of the radial height Hdc, the distance between carcass layers is at least equal to 2 and at most equal to 11 times the diameter of metal reinforcers of first carcass layer ().