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Rear Derailleur We offer both replacement stock derailleurs and upgrades to keep you shifting properly. If you upgrade to a different model rear derailleur, be aware that you will usually need to change shifters as well. Shimano RD-M4120 Deore Rear Derailleur - 10/11 Speed $26.00 For 2x11, 2x10-speed Low profile design avoids damage from rocks Max. low sprocket: 42T Compatible Chain: HG 10/11-speed Low Sprocket Min: 42T Max Front Difference: 10T Cage Length: SGS Long Cage Rear Speeds: 11/12 Total Capacity: 41T Number of Pulley Teeth: 11 Mount: Direct attachment (conventional)/Direct mount compatible Color: Black - (More Details) IN STOCK Results 1 - 1 of 1 Go to Page: 1