M-series rear derailleurs are designed to work with 7, 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 7, 8, and 9-speed mountain and road systems