| 主权项 |
1. A sprocket assembly for a bicycle freewheel, 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 and 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. |
