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

Long cage for double or triple 32T setup

Model: M21 Rear Derailleur

Brand: microSHIFT

QBP #: RD0210 

Manufacturer Part Number: RD-M21L

UPC: 4710495436340

Color: Black

Largest Cog: 32

Rear Derailleur Mount Type: 10x1 Standard

Chain Wrap Capacity (teeth): 43

Rear Der/Shifter Compatibility: Shimano Mountain

Cage Length: Long

Drivetrain Speeds: 6 , 7

Weight: 206