Abstract: The present invention concerns a runflat device for a tubeless mounted assembly for a motor vehicle and an assembly incorporating said device. A device of the invention comprises an asymmetrical one-piece type rim comprising a drop center with two lateral walls and a tire cover mounted on the rim, the device being designed to be mounted in the drop center and comprising: a support ring divided into independent ring sectors having two lateral faces; and an annular clamping belt adapted to be mounted on and to bear on a radially inner bearing zone of one lateral face of the ring to wedge each ring sector in the drop center; and in which the device is such that the belt comprises means for exerting a lateral clamping force and a radial clamping force on the bearing zone so that said belt clamps said ring sectors against one of said lateral walls and against said drop center, bearing on the other lateral wall.

Abstract: The present invention concerns a runflat device for a tubeless mounted assembly for a motor vehicle and an assembly incorporating said device. A device of the invention comprises an asymmetrical one-piece type rim comprising a drop center with two lateral walls and a tire cover mounted on the rim, the device being designed to be mounted in the drop center and comprising: a support ring divided into independent ring sectors having two lateral faces; and an annular clamping belt adapted to be mounted on and to bear on a radially inner bearing zone of one lateral face of the ring to wedge each ring sector in the drop center; and in which the device is such that the belt comprises means for exerting a lateral clamping force and a radial clamping force on the bearing zone so that said belt clamps said ring sectors against one of said lateral walls and against said drop center, bearing on the other lateral wall.