Abstract: Apparatus particularly advantageous for use as part of a bicycle or other chain drive assembly featuring a single plate formed to embody a plurality of drive sprockets. A preferred embodiment illustrated is comprised of a plate the central portion of which is dished and offset to a plane parallel to that occupied by an outer annular portion which embodies a set of sprocket teeth on its outer periphery. The offset plate portions are rigidly fixed in their respective positions by strip-like connectors which extend from the outer periphery of the dished portion of the plate to the inner periphery of said annular plate portion. The central dished portion of the plate is flat and has a disc-like configuration which also embodies sprocket teeth on its outer periphery, intermediate notched portions thereof from which extend the radial connector strips.Also featured is a plate-like chain guard which has a dished configuration.