microSHIFT M21 Rear Derailleur - 6,7 Speed, 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 Product Specifics Largest Cog: 34 Rear Der/Shifter Compatibility: Shimano Mountain Rear Derailleur Mount Type: 10x1 Standard Drivetrain Speeds: 6 Drivetrain Speeds: 7 Chain Wrap Capacity (teeth): 39 Cage Length: Short Color: Black Today's Stock Status 10+ Available to ship in 2-4 Business Days UPC: 657993356869 EAN: Not available Manufacturer Part Number: RD-M21S RD0034 184142-Q0-L