Shimano Acera RD-M3020 7/8 Speed Rear Derailleur SGS Long Cage

Shimano Acera RD-M3020 rear derailleur with long cage. Double Servo 7/8 speed rear derailleur with smooth, precise shifting performance and wide-range capability. The rear derailleur is compatible to cassettes with up to 40 teeth. The wide link design increases the stiffness for smooth shifting performance and long durability. MPN: RD-M3020-8