Patent attributes
A sprocket assembly for a bicycle freewheel that comprises 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 comprises a central opening having an edge and a plurality of drive elements at the edge. The plurality of drive elements extend radially inwardly from the edge. The plurality of drive elements constructed to transmit torque from the sprocket to a driver on a rear wheel hub of a bicycle. 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 is disposed on at least three locations distributed about a periphery.
