microSHIFT M21 Rear Derailleur – 67 Speed Short Cage Black

DescriptionmicroSHIFT M21 Rear Derailleur – 67 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 constructionCompatible with Shimano 6- and 7-speed mountain and road systems TECH SPECSCage LengthShortChain Wrap Capacity (teeth)39ColorBlackDrivetrain Speeds6Drivetrain Speeds7Largest Cog34Rear Der/Shifter CompatibilityShimano MountainRear Derailleur Mount Type10×1 Standard