Shimano ACERA/ALIVIO 9 Speed Mountain Bike Rear Derailleurs

Acera: The Acera component set is characterized by three essential features: precise operation, meticulous design, and style. This set offers accurate shifting with minimized pedaling energy loss, high braking power, and top-notch efficiency for precise speed control and an exciting, sleek design solution.

Alivio: The Alivio component set is a complete set with advanced Shimano features. Features include effective V-brakes, Rapidfire Plus shifting, precise and fast derailleurs with long lifespan, and rigid and precise derailleur shifting.