microSHIFT MTB RD-M21SS Rear Derailleur - 1x6/7-speed - super short

The microSHIFT line of mountain and trekking derailleurs starts with M21, but that doesn’t mean it’s entry level. Using the same kinematics as our more expensive derailleurs and innovative construction technics, M21 delivers responsive performance in an attainable package. Features of the microSHIFT MTB RD-M21SS Rear Derailleur Robust attachment body improves durability and shifting response Super short cage Max Cog 28-30 Teeth Min Cog 13-14 Teeth Capacity 21 Teeth Compatibility Shimano Mountain