Make cycling an essential part of your fitness lifestyle with the CUES RD-U4020 Shadow 2x9-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 CUES 9-Speed LINKGLIDE shifters.Features-ONLY compatible with 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-Designed and tested to provide enduring e-biking performance-11t pulley wheels-Compatible with LINKGLIDE AND HG 11-speed chainsItem Specifications-Largest Cog:36-Color:Black-Color:Silver-Rear Der/Shifter Compatibility: Mountain-Rear Derailleur Mount Type: Rear Direct Mount-Rear Derailleur Mount Type:10x1 Standard-Drivetrain Speeds:9-Designed for ebike:Yes-Chain Wrap Capacity (teeth):41-Cage Length:Medium