Shimano Acera RD-M3020 Rear Derailleur - 7/8-speed - SGS | long

The Double Servo construction of the Shimano Acera RD-M3020 rear derailleur for mechanical 7- and 8-speed shifting systems provides smooth yet precise shifting performance with every gear change. In doing so, it not only covers a wide range of applications, but also allows you to ride challenging terrain with a minimum of interruptions. Version with long derailleur cage (SGS). Material: aluminum (painted), steel (painted / zinc plated)