Tire comprising reduced rubber mixture thicknesses and sheathed casing framework reinforcement elements

[0079] exist Figure 1a and 1b Among them, a tire 1 of size 315 / 70R 22.5 comprises a radial carcass reinforcement 2 anchored in two beads 3 around a bead wire 4 . The carcass reinforcement 2 is formed of a single metal cord layer 11 and two calendered layers 13 . The carcass reinforcement 2 is hooped by a crown reinforcement 5 , which is itself covered by a tread 6 . The crown reinforcement 5 is formed radially from the inside to the outside by:

[0080] - a first working layer formed of unwound non-extensible 11.35 metal cords continuous across the entire width of the ply and oriented at an angle of 18°,

[0081] - A second working layer formed of unwound, non-extensible 11.35 metal cords continuous across the entire width of the ply and oriented at an angle of 18° and crossing the metal cords of the first working layer ,

[0082] - Protective layer formed by elastic 6x35 metal cords.

[0083] This combination of the layers making up the crown reinforcement 5 is not spec...