Shimano Acera Rear Derailleur – RD M3020 (SGS, 8-Speed)

The Shimano Acera RD-M3020-8 rear derailleur with Double Servo technology helps you ride challenging terrain with fewer interruptions and offers smooth, precise shifting performance and wide-range capability. The RD-M3020 is the successor of the Acera RD-M360 and now brings a longer pulley cage (SGS) for wider gear compatibility at the back with support up to 40T. Shimano also released a new 8-Speed cassette (HG400-8 11-40T) to go with this rear derailleur.