microSHIFT M21 Rear Derailleur - 6/7 Speed, Super Short Cage, 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: 32
• Rear Der/Shifter Compatibility: Shimano Mountain
• Rear Der/Shifter Compatibility: Shimano Road
• Rear Derailleur Mount Type: 10x1 Standard
• Drivetrain Speeds: 6
• Drivetrain Speeds: 7
• Chain Wrap Capacity (teeth): 21
• Cage Length: Short
• Color: Black
• Weight: 241