Details
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 cranksets and 32T max cassette cog
- Includes frame hanger attachment for use with older frame designs
Part Numbers
Option | UPC | MPN | Store SKU |
---|---|---|---|
Long Cage / Black / 6 – 7-speed | 04710495436357 | RD-M21LA | 210000020911 |