TIRE COMPRISING CABLES FOR REINFORCING THE CASING HAVING LOW PERVIOUSNESS, AND TEXTILE THREADS ASSOCIATED WITH THE CASING REINFORCEMENT

A tire having a radial carcass reinforcement, composed of at least one layer of metal reinforcing elements, and having a crown reinforcement, itself topped radially by a tread, the said tread being joined to two beads via two sidewalls. The metal reinforcing elements of at least one layer of the carcass reinforcement are cords exhibiting, in the "permeability" test, a flow rate of less than 20 cm3/min and at least one layer of the carcass reinforcement is provided, on at least one face, with non-continuous textile threads composed of two parts, one end of a textile thread being positioned on the turn-up of the said at least one layer of reinforcing elements around the bead wires and the other end of a textile thread being radially interior to the orthogonal projection of the shoulder end onto the said at least one face of the said at least one layer of the carcass reinforcement.