Sprocket assembly with adapter

A drive assembly for a bicycle, the drive assembly comprising:

• a sprocket assembly comprising:
• a sprocket having a central opening, and
• an adapter constructed separately from the sprocket and adapted to be connected to the sprocket in a rotationally secure manner, the adapter comprising a central opening having an edge, a plurality of drive elements at the edge, the plurality of drive elements extending radially inwardly from the edge, the drive elements constructed to transmit torque from the sprocket to a driver on a rear wheel hub of a bicycle,
• wherein a minimum radius of the central opening of the sprocket is smaller than a maximum radius of the central opening of the adapter, the minimum radius of the central opening of the sprocket disposed on at least three locations distributed about a periphery;
• and
• a driver having a plurality of drive elements constructed to engage between the drive elements of the adapter to ensure torque transmission from the sprocket via the adapter to the driver, wherein the radial play between the driver and the sprocket is smaller than the radial play between the driver and the adapter.