The CUES RD-U4010 derailleur from Shimano is a highly advanced mechanical derailleur specifically designed for use in 1x drivetrain systems. It is ideal for various types of bicycles, including city bikes and racing bikes, and is particularly well-suited for gravel applications. The model features a Shadow construction that offers improved stability and reduced susceptibility to damage. The derailleur is exclusively compatible with Linkglide and requires an HG 11-speed chain to ensure optimal shifting performance. The direct mount allows for easy installation and adjustment to different frames. With the 2025 model year, Shimano delivers a reliable and powerful solution for cyclists who value precise shifting operations. The CUES RD-U4010 is therefore an excellent choice for anyone looking for a robust and efficient derailleur for their bike.