Shimano Deore RD-M4120 SGS Long Cage 10/11-Speed Rear Derailleur Brand_Token 3-row screen with up to

3-row screen with up to four data displays and is also triple wireless upgradeable with an optional heart rate sensor so you can capture all the data you need

where it differs is in its level of padding

moisture wicking

sanding metal

Shimano Deore RD-M4120 SGS Long Cage 10/11-Speed Rear Derailleur Brand_Token 3-row screen with up toSHIMANO DEORE Rear Derailleur SHIMANO SHADOW RD 2x10 11 speed RD M4120 SGS SHIMANO DEORE Rear Derailleur SHIMANO SHADOW RD 2x10 11 speed Using a low profile SHIMANO SHADOW RD design, the SHIMANO DEORE M4120 derailleur is perfect for 2x10 and 2x11 speed MTB riding. FEATURES For 2X11 and 2x10 speed Low profile design avoids damage from rocks PRODUCT SPECIFICATIONS MODEL NO RD M4120 SGS SERIES DEORE M4100 Series Color Series color Compatible chain HG X11