M-series rear derailleurs are designed to work with 8 and 9-speed Shimano-compatible mountain and road shifters. These Mezzo rear derailleurs are light, robust, and reliable. You can count on them to get any bike on the road.
Weight saving aluminum bracket body and outer link
Steel pulley cage for extra chain-rub durability
Compatible with Shimano 8 and 9-speed mountain and road systems