This is our 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.

Features:

• Robust composite and steel construction
• Compatible with Shimano 6- and 7-speed mountain and road systems

Specifications:

• Rear Derailleur Mount Type:10x1 Standard
• Rear Der/Shifter Compatibility: Shimano Mountain
• Rear Der/Shifter Compatibility: Shimano Road
• Cage Length: Short
• Drivetrain Speeds:6
• Drivetrain Speeds:7
• Weight:0.66 lbs
• Color: Black
• Chain Wrap Capacity (teeth):21
• Largest Cog:32

Package includes:

• 1 x MicroSHIFT M21 Rear Derailleur