Abstract: There is provided an electric motor/generator comprising a stator and a rotor. The stator has an outer perimeter. The rotor at least coaxially encloses the outer perimeter of the stator. The rotor is rotatable relative to the stator around a rotation axis. The rotor and the stator are separated by a flux bearing gap over which in working magnetic flux occurs. The rotor and the stator are separated by a protective gap. The protective gap is configured to close, during a deformation of the rotor, before the flux bearing gap closes, thereby avoiding closure of the flux bearing gap. The motor/generator is characterized in that the stator comprises a roller bearing and an axle. The roller bearing is coupled to the axle and rotatable around the axle. The axle is arranged off-center from the rotation axis. A distance between the roller bearing and the rotor defines the protective gap.

Abstract: The invention pertains to a wheel cover holder (4) for a wheel (3) of a vehicle (25), which wheel (3) is turnable relative to the vehicle (25) over a turning angle (a), wherein the wheel cover holder (4) is configured to hold at least one air-guiding cover (5, 14); the wheel cover holder (4) being configured to be connected to a steering mechanism (13) of the wheel (3) such that the wheel cover holder is turnable by the steering mechanism (13) during the steering of the wheel (3), wherein the wheel cover holder (4) is configured to turn along with the wheel (3) if the turning angle (a) is greater than a turning angle threshold, and to remain in a neutral position if the turning angle (a) is smaller than the turning angle threshold. The invention further pertains to a vehicle (25) comprising such a wheel cover holder (4).