microSHIFT M21 Rear Derailleur - 6,7 Speed, Long Cage, Black Bike Brand_GT Includes self-leveling helmet mount

Includes self-leveling helmet mount

Aluminum valve stems for use with Whisky tubeless rims and most others

The stroke of genius that makes all the difference is the combination of the internal bike stand that locks your bike into place

Features inner and outer plate chamfering to aid in smooth shifting

BB86/92 Thread Together Bottom Bracket

microSHIFT M21 Rear Derailleur - 6,7 Speed, Long Cage, Black Bike Brand_GT Includes self-leveling helmet mountM21 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 Color: Black Largest Cog: 32 Rear Derailleur Mount Type: 10x1 Standard Chain Wrap Capacity (teeth): 43 Rear Der Shifter