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

• Largest Cog: 30
• Rear Der/Shifter Compatibility: Shimano Mountain
• Rear Derailleur Mount Type: Dropout Claw Hanger
• Drivetrain Speeds: 6
• Drivetrain Speeds: 7
• Chain Wrap Capacity (teeth): 39
• Cage Length: Short
• Color: Black