REIFEN MIT ERWEITERTER MOBILITÄT, DER MEHRERE SEHR NIEDRIGE ANKERBEREICHE AUFWEIST

摘要

Extended-mobility tire includes at least one carcass-type reinforcement structure, with each of the tire's sidewalls being reinforced by a sidewall insert. Each bead of the tire includes an anchoring zone permitting the reinforcement structure to be held on a rim and including an anchoring rubber mix with a series of circumferential cord windings. Each bead further includes a bead seat zone formed of a rubber mix of modulus ME 10 which is less than that of the mix of the anchoring zone and arranged radially internally of the anchoring zone. The bead seat zone physically separates the anchoring zone from the seat of the rim when the tire is mounted. The bead seat zone has a maximum thickness of 2.8 mm, and is preferably equal to or less than 2.2. mm. This arrangement makes it possible to increase the tire's lateral rigidity, without adversely affecting the intrinsic properties of the tire's rim zone and/or the sidewalls.