Shimano Deore M5100 11 Speed Rear Derailleur

Shimano Deore 11 speed rear derailleur SGS Long Cage Designed to work with Shimano's 11-51T M5100 11 speed cassette and 11 speed M5100 shifter. Max capacity 51T Large 13T pulley wheels. Strong return spring. Not compatible with Shimano 12 speed components or older Shimano 11 speed components.