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 comprising a circumferential reinforcement, - a radially inner structure of revolution that is coaxial with the radially outer structure of revolution and is intended to provide the connection of the tyre-type device to a means for mounting on the vehicle, the radially inner structure of revolution having two axial ends and comprising at least one polymeric material, - an inner annular space of mean radial height H that is radially delimited by the radially outer and radially inner structures of revolution, respectively, - a bearing structure made up of a plurality of bearing elements that extend continuously from the radially outer structure of revolution to the radially inner structure of revolution and are independent in pairs in the inner annular space, 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 n 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, - each bearing element having a force at break under tension F r, and a mean section that has an aspect ratio K equal to L/E, where L and E are the largest and smallest characteristic dimensions, respectively, of the mean section, - the smallest characteristic dimension E of the mean section of any bearing element being at most equal to 0.02 times the mean radial height H of the inner annular space, - the surface density D of the bearing elements per unit area of radially outer structure of revolution, expressed in 1/m 2, being at least equal to Z/(A ∗ ΣF r /n), where Z is the nominal radial load, expressed in N, A is the area of contact with the ground, expressed in m 2, and ΣF r /n is the mean force at break under tension of the n bearing elements made to buckle under compression, expressed in N, - the tyre-type device comprising two sidewalls that connect the axial ends 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, characterized in that the tyre-type device comprises a carcass reinforcement extending radially in each sidewall and axially at least partially in the radially outer structure of revolution and at least partially in the radially inner structure of revolution. - 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 comprising a circumferential reinforcement, - a radially inner structure of revolution that is coaxial with the radially outer structure of revolution and is intended to provide the connection of the tyre-type device to a means for mounting on the vehicle, the radially inner structure of revolution having two axial ends and comprising at least one polymeric material, - an inner annular space of mean radial height H that is radially delimited by the radially outer and radially inner structures of revolution, respectively, - a bearing structure made up of a plurality of bearing elements that extend continuously from the radially outer structure of revolution to the radially inner structure of revolution and are independent in pairs in the inner annular space, 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 n 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, - each bearing element having a force at break under tension F r, and a mean section that has an aspect ratio K equal to L/E, where L and E are the largest and smallest characteristic dimensions, respectively, of the mean section, - the smallest characteristic dimension E of the mean section of any bearing element being at most equal to 0.02 times the mean radial height H of the inner annular space, - the surface density D of the bearing elements per unit area of radially outer structure of revolution, expressed in 1/m 2, being at least equal to Z/(A ∗ ΣF r /n), where Z is the nominal radial load, expressed in N, A is the area of contact with the ground, expressed in m 2, and ΣF r /n is the mean force at break under tension of the n bearing elements made to buckle under compression, expressed in N, - the tyre-type device comprising two sidewalls that connect the axial ends 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,