ACERA RD-M3020 7/8-speed Rear Derailleur
 
The Shimano ACERA RD-M3020 7/8-speed rear derailleur provides smooth and precise shifting performance and a wide-range capability. The SHIMANO ACERA M3020-8 rear derailleur with Double Servo technology helps you ride challenging terrain with fewer interruptions.
 
Pulley cage
Type-SGS long
 
Material
Aluminum
Steel
 
Color
Black
 
 
Technology
Double Servo
SHIMANO’s double servo-panta mechanism enables the rear derailleur to move in an optimum path. The guide pulley tracks the cogs closely while moving front to back, optimizing each shift. Perfect tracking contributes to the most accurate SIS shifting. Keeps rear derailleur guide pulley an optimum distance from each sprocket. Keeps rear derailleur guide pulley an optimum distance from each sprocket.