Tyre-type device intended to equip a vehicle, comprising: - a radially outer structure of revolution, the axis of revolution of which is the axis of rotation (YY') of the tyre-type device and which is intended to come into contact with the ground via a tread comprising at least one elastomeric material, the radially outer structure of revolution having two axial ends and a radially inner face having an area S, and the radially outer structure of revolution comprising a circumferential reinforcement, - a radially inner structure of revolution that is coaxial with the radially outer structure of revolution and is intended to ensure the connection of the tyre-type device with a means for mounting on the vehicle, the radially inner structure of revolution having two axial ends and a radially outer face, and the radially inner structure of revolution comprising at least one polymeric material, - an inner annular space of mean radial height H that is radially delimited by the radially inner face of the radially outer structure of revolution and by the radially outer face of the radially inner structure of revolution, - a bearing structure made up of a plurality of identical bearing elements that are independent in pairs, that is to say are not mechanically connected together, in the inner annular space, the bearing elements extending continuously from the radially inner face of the radially outer structure of revolution to the radially outer face of the radially inner structure of revolution, such that, when the tyre-type device is subjected to a nominal radial load Z and is in contact with flat ground via an area of contact A, the bearing elements that are connected to that portion of the radially outer structure of revolution that is in contact with the ground are made to buckle under compression and at least some of the bearing elements that are connected to that portion of the radially outer structure of revolution that is not in contact with the ground are under tension, wherein the bearing elements of the bearing structure are filamentary, characterized in that the bearing elements of the bearing structure are connected to the radially inner face of the radially outer structure of revolution by a radially outer fabric, at least partially covering said radially inner face over a connecting area S E, and are connected to the radially outer face of the radially inner structure of revolution by a radially inner fabric, at least partially covering said radially outer face, the assembly made up of the bearing structure, the radially outer fabric and the radially inner fabric being a sandwich structure, in that the mean surface density D of the bearing elements per unit area of radially outer structure of revolution, expressed in 1/m 2, is at least equal to (S/S E) *Z/(A*F r), where S is the area, in m 2, of the radially inner face of the radially outer structure of revolution, S E is the connecting area, in m 2, of the radially outer fabric with the radially inner face of the radially outer structure of revolution, Z is the nominal radial load, in N, applied to the tyre-type device, A is the area of contact with the ground, in m 2, of the tyre-type device, and F r is the force at break, in N, of a bearing element, and in that the tyre-type device comprises two sidewalls that connect, in pairs, the axial ends (24, 34) of the radially outer and radially inner structures of revolution, respectively, and axially delimit the inner annular space, such that the inner annular space forms a closed cavity that can be pressurized by an inflation gas. - a radially outer structure of revolution, the axis of revolution of which is the axis of rotation (YY') of the tyre-type device and which is intended to come into contact with the ground via a tread comprising at least one elastomeric material, the radially outer structure of revolution having two axial ends and a radially inner face having an area S, and the radially outer structure of revolution comprising a circumferential reinforcement, - a radially inner structure of revolution that is coaxial with the radially outer structure of revolution and is intended to ensure the connection of the tyre-type device with a means for mounting on the vehicle, the radially inner structure of revolution having two axial ends and a radially outer face, and the radially inner structure of revolution comprising at least one polymeric material, - an inner annular space of mean radial height H that is radially delimited by the radially inner face of the radially outer structure of revolution and by the radially outer face of the radially inner structure of revolution, - a bearing structure made up of a plurality of identical bearing elements that are independent in pairs, that is to say are not mechanically connected together, in the inner annular space, the bearing elements extending continuously from the radially inner face of the radially outer structure of revolution to the radially outer face of the radially inner structure of revolution, such that, when the tyre-type device is subjected to a nominal radial load Z and is in contact with flat ground via an area of contact A, the bearing elements that are connected to that portion of the radially outer structure of revolution that is in contact with the ground are made to buckle under compression and at least some of the bearing elements that are connected to that portion of the radially outer structure of revolution that is not in contact with the ground are under tension,