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 Derailleur Mount Type	Dropout Claw Hanger
Drivetrain Speeds	7
Chain Wrap Capacity (teeth)	43
Cage Length	Long
Color	Black
Weight	316
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