Patent ID: 8066603

Claim:
A multi-speed sprocket assembly for engaging a bicycle chain displaceable by a derailleur comprising: at least one smaller sprocket; and at least one larger sprocket including first and second transitional segments for alternatively receiving a shifting chain segment of the bicycle chain shifting from the smaller sprocket to the larger sprocket, the first transitional segment including a first run-on ramp configured to receive an outer link plate of the shifting chain segment, the first run-on ramp having a first support point configured to bend the shifting chain segment at a first angle to position a first chain roller against a no-load tooth flank of the larger sprocket while a second chain roller rests against a load tooth flank of the smaller sprocket, the second transitional segment including a second run-on ramp configured to receive the outer link plate of the shifting chain segment, the second run-on ramp having a second support point configured to bend the shifting chain segment at a second angle to position the first chain roller against the no-load tooth flank of the larger sprocket while the second chain roller rests against the load tooth flank of the smaller sprocket.