The Shimano CUES RD-U4020 SGS rear derailleur is designed for 9-speed drivetrains. Its Shadow design provides reliable shifting and a clean profile for compatible mountain, hybrid and recreational bikes.
The SRAM Apex XPLR D1 rear derailleur is designed for 12-speed gravel drivetrains. Built for smooth, reliable shifting, it is a great choice for gravel bikes and riders tackling a variety of terrain.
