Wheel holder

A wheel holder (2) for fastening to a wheel (1), including a wheel (1) of a motor vehicle, the wheel holder (2) comprising:

• at least two arms (22, 23, 24) extending outward from a center (28) of the wheel holder (2) in a radial direction, each of the at least two arms (22, 23, 24) having at least one movable element (32, 33, 34) that is movable in the radial direction;
• a synchronization system (40, 52, 53, 54) which is designed to synchronize the at least one movable elements (32, 33, 34), the synchronization system (40, 52, 53, 54) comprising:
• a central rotation element (40) that is disposed in the center (28) of the wheel holder (2) such that it can rotate;
• and
• at least two coupling elements (52, 53, 54) each extending between one of the at least one movable elements (32, 33, 34) and the central rotation element (40) such that the at least one movable elements (32, 33, 34) are movable in the radial direction by rotation of the central rotation element (40);
• and
• a drive system (63, 64, 73, 74) which is designed to drive the at least one movable elements (32, 33, 34), the drive system (63, 64, 73, 74) comprising at least one drive device (63, 64) and at least one force transmitting element (73, 74);
• wherein the at least one drive device (63, 64) is designed to generate a force and to transfer the same via the at least one force transmitting element (73, 74) to one of the at least one movable elements (32, 33, 34) such that the force acting on the at least one movable element (32, 33, 34) is directed towards the center (28) of the wheel holder (2);
• and
• wherein the at least one drive device (63, 64) comprises a wheel, a roller or a drum (93, 94), and wherein the at least one force transmitting element (73, 74) is adapted to be wound onto the wheel, the roller or the drum (93, 94).