The Shimano CUES RD-U4000 Shadow 1×9-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.

• 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 Shimano CUES 9-Speed LinkGlide shifters