Sprocket mechanism for a multistage bicycle
Sprocket of a chain transmission for a bicycle
Sprocket of a chain transmission for a bicycle
Sprocket supporting unit for a bicycle
Sprocket wheel mounting unit for a bicycle
Sprocket-brake drum construction for chain saw
Tooth contour structure for large sprocket set of bicycle
Toothed belt drive gear for a motor vehicle wheel
Top sprocket for a rear sprocket assembly and rear sprocket...
Top sprocket for a rear sprocket assembly and rear sprocket...
Variable ratio chain drive employing synchronous flexible sprock
Variable speed-type bicycle chain ring assembly
Warped chain ring gear used in a bicycle chain transfer