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
- Teething and chewing toys for puppiesM21 Rear Derailleur - 6,7 Speed, Short Cage, Black
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