Shimano CUES RD-U4020-SGS Rear Derailleur - 9-Speed | Medium Cage

What Makes the Shimano CUES RD-U4020-SGS the Right LINKGLIDE Derailleur?

The Shimano CUES RD-U4020-SGS is a 9-speed medium cage rear derailleur built exclusively for the LINKGLIDE shifting system, delivering the reliable gear changes that CUES drivetrains are optimized for in daily and commuter use. The LINKGLIDE-compatible actuation ratio works with CUES shifters to provide clean transitions across wide-range LINKGLIDE cassettes including the CS-LG400 series up to 48t. Shadow technology keeps the derailleur body tucked closer to the frame, reducing the chance of impact damage on urban terrain or light trail use.

This derailleur is only compatible with Shimano CUES LINKGLIDE 9-speed shifters and will not function correctly with standard Hyperglide or HG cable pull ratios. The medium cage handles LINKGLIDE cassettes up to 48t with the appropriate chain length, making it the right match for single front ring builds with wide range gearing. For commuters, city riders, and anyone building a CUES drivetrain from the ground up, the RD-U4020-SGS is the designated rear derailleur for the job.