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 constructionCompatible with Shimano 6- and 7-speed mountain and road systems
| Largest Cog |
32 |
| Rear Der/Shifter Compatibility |
Shimano Mountain |
| Rear Derailleur Mount Type |
10x1 Standard |
| Drivetrain Speeds |
7 |
| Chain Wrap Capacity (teeth) |
43 |
| Cage Length |
Long |
| Color |
Black |
| Weight |
206 |
