microSHIFT M21 Rear Derailleur - 6,7 Speed, Short Cage, Dropout Claw Hanger, Black

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
• Cage Length: Short
• Chain Wrap Capacity (teeth): 39
• Color: Black
• Drivetrain Speeds: 7
• Rear Der/Shifter Compatibility: Shimano Mountain
• Rear Derailleur Mount Type: Dropout Claw Hanger