The invention relates to a hub covering (2) for a tyre filling device of a vehicle for covering a wheel hub (1) of the vehicle, wherein an air supply which is coupled to a steering knuckle (21) arranged inside the wheel hub (1) is connected to an air volume in a tyre of a vehicle wheel at least indirectly via a rotary connection (3) arranged on the hub covering (2), wherein the rotary connection (3) comprises an adapter (4), which is arranged in an axially secured and rotatable manner on the hub covering (4), and receives a rotary transmitter (5) for producing a compressed air connection to the tyre of the vehicle wheel. The invention further relates to a tyre filling device and to an adapter (4) for such a hub covering (2).