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