Make cycling an essential part of your fitness lifestyle with the Shimano CUES Shadow RD-U3020 9-speed rear derailleur. Designed for daily riding dependability its smooth and decisive rear shifting will keep you moving around town and into the countryside. ONLY compatible with Shimano CUES 9-Speed LINKGLIDE shifters.ONLY compatible with Shimano CUES 9-Speed LINKGLIDE shiftersStable drivetrain performance on trails gravel and city streetsShadow low-profile design protects rear derailleur from obstacles in a wide variety of riding scenes11t pulley wheelsCompatible with LINKGLIDE AND HG 11-speed chains