The microSHIFT Mezzo M36 rear derailleur is a great choice for riders looking for a reliable and lightweight shifting system. This derailleur is compatible with Shimano 8 and 9-speed mountain and road shifters and is designed to work seamlessly with these systems. The Mezzo M36 derailleur is made from a combination of lightweight aluminum and durable steel, making it robust and long-lasting. The steel pulley cage provides extra chain-rub durability, ensuring that your bike's drivetrain will last for many miles to come. The long cage of this derailleur is perfect for double or triple chainring setups, making it a versatile option for a variety of riding styles. With a black finish and a sleek design, this derailleur is a great choice for anyone looking to upgrade their bike's drivetrain.