Description
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.
| Largest Cog | 32 |
| Rear Der/Shifter Compatibility | Shimano Mountain |
| Rear Derailleur Mount Type | 10×1 Standard |
| Drivetrain Speeds | 7 |
| Chain Wrap Capacity (teeth) | 43 |
| Cage Length | Long |
| Color | Black |
| Weight | 206 |
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