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.

Details

• Robust composite and steel construction
• Compatible with Shimano 6- and 7-speed mountain and road systems
• Long cage for double or triple 32T setup
• Includes frame hanger attachment

Specs

• Color: Black
• Largest Cog: 32
• Rear Derailleur Mount Type: Dropout Claw Hanger
• Chain Wrap Capacity (teeth): 43
• Cage Length: Long
• Rear Der/Shifter Compatibility: Shimano Mountain
• Drivetrain Speeds: 6 , 7
• Weight: 316