microSHIFT M21 Rear Derailleur - 6/7 Speed Super Short Cage Dropout Claw Hanger BLK Tooth Count-14 5-45MM) 450 LB

5-45MM) 450 LB

Original equipment on SRAM and Truvativ cranks they also work well with other drive trains

Length 143

Not compatible with Shimano Asymmetric 110 BCD cranks or Campagnolo CX10/11 cranks

microSHIFT M21 Rear Derailleur - 6/7 Speed Super Short Cage Dropout Claw Hanger BLK Tooth Count-14 5-45MM) 450 LBmicroSHIFT M21 Rear Derailleur 6 7 Speed Super Short Cage Dropout Claw Hanger Black. M21 rear derailleurs are designed to work with 6 and 7 speed Shimano road and mountain shifters. Enjoy the wide variety of bikes you can get going again with M21 rear derailleurs. Robust composite and steel construction Compatible with Shimano 6 and 7 speed mountain and road systems TECH SPECS Largest Cog 30Rear Der Shifter Compatibility Shimano MountainRear