The Shimano Acera RD-M3020 rear derailleur features Double Servo technology to provide smooth precise shifting and helps you ride challenging terrain with fewer interruptions.

Double Servo mechanism enables the rear derailleur to move in an optimum path

Versatile performance and wide compatibility

SGS Long cage

Rear Der/Shifter Compatibility	Shimano Mountain
Rear Derailleur Mount Type	10x1 Standard
Drivetrain Speeds	7
Chain Wrap Capacity (teeth)	45
Cage Length	Long
Color	Black
keyword search	3020