Shimano Saint M820 Rear Derailleur Short Cage

Shimano Saint M820 Rear Derailleur Short Cage. Shimano Saint is simply built to take a beating and the Shimano Saint M820 Rear Derailleur is at its heart. The Saint RD features the legendary Shadow Clutch that all but eliminates any chain slap. That means more power is delivered directly into the pedals through chain tension. It's designed to handle even the most gnarly singletrack, so open it up and let the Saint components take you home.