Shimano CUES RD-U4020-SGS Rear Derailleur - 9-Speed Shadow Design Direct Attach Medium Cage BLKShimano CUES RD U4020 SGS Rear Derailleur 9 Speed Shadow Design Direct Attach Medium Cage Black. Make cycling an essential part of your fitness lifestyle with the Shimano CUES RD U4020 Shadow 2x9 speed rear derailleur. Designed for daily riding dependability its smooth and decisive rear shifting will keep you moving around town and into the countryside. Stable drivetrain performance on trails gravel and city streets Shadow low profile design protects