Patent ID: 7819157

Claim:
A tire comprising sidewalls joining a crown part to beads that are intended to come into contact with a mounting rim, these sidewalls comprising a carcass reinforcement comprising a plurality of reinforcing members placed at an angle of at least 70° to the circumferential direction, this carcass reinforcement being anchored in each bead to at least one bead wire and having an end A in each bead, the bead wire exhibiting essentially circumferential extensional rigidity and having, seen in meridian cross-section, an outer profile comprising two profile parts, a first part radially to the inside of axial width L, extending between an axially innermost point B 2 and an axially outermost point B 1 , and a second part radially to the outside between said points B 1 and B 2 , this bead wire being covered with at least one profiled element made of rubber compound in order to provide a mechanical link with the carcass reinforcement, this carcass reinforcement being partially wrapped around the bead wire going axially outward from the inside of the tire so that its end A is located axially between the end points B 1 and B 2 and radially to the inside of the radially internal first profile part of the bead wire, each bead comprising at least one additional coupling reinforcement in contact over a contact length D with the carcass reinforcement, said contact length D being measured starting from the end A of the carcass reinforcement, wherein the tire comprises, in each bead and seen in meridian cross-section—i.e. in a cross-sectional plane containing the axis of rotation: said additional coupling reinforcement extends the carcass reinforcement so as to be at least partly wrapped around the bead wire, that is to say so as to at least partially cover the second part of the radially external profile of the bead wire between the end points B 1 and B 2 , said additional coupling reinforcement having a trace such that the tangent DK to this trace, at a point K on said reinforcement, makes an angle of less than 45° to a straight line parallel to the axis of rotation, this point K being determined as the point of intersection between the trace of the additional reinforcement and a straight line passing through the radially outermost point of the bead wire profile and perpendicular to the axis of rotation.