Shimano CUES FD-U6030-F Front Derailleur - 9/10-Speed Double Down-Swing Braze-On 46/50t Max BLK/SilverShimano CUES FD U6030 F Front Derailleur 9 10 Speed Double Down Swing Braze On 46 50t Max Black Silver. One Front Derailleur for all Shimano CUES Drop Handle Bikes. The Shimano CUES FD U6030 Front Derailleur offers lighter front shifting operation and easier setup thanks to the toggle link construction and integrated cable tensioner. It features a 2. 5 mm outboard chain line design to allow wider tire clearance. Toggle link construction delivers