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
- Long cage for double or triple 32T setup
|Rear Derailleur Mount Type||10x1 Standard|
|Rear Der/Shifter Compatibility||Shimano Mountain|