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 shifters - Stable drivetrain performance on trails, gravel, and city streets - Shadow low-profile design protects rear derailleur from obstacles in a wide variety of riding scenes - 11t pulley wheels - Compatible with LINKGLIDE AND HG 11-speed chains