This CUES RD-U4000 Shadow 1x9-speed rear derailleur's smooth operation and dependability will help inspire riders to expand their trail-riding comfort zone. Its low-profile design and chain stabilization will give them the confidence to choose rougher routes. ONLY compatible with CUES 9-Speed LINKGLIDE shifters. 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. Optimized geometry and spring tension reduce chain drop. Designed and tested to provide enduring e-biking performance. 13t pulley wheels. Compatible with LINKGLIDE AND HG 11-speed chains. Item Specifications: Largest Cog: 46, 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): 35, Cage Length: Medium,