Shimano CUES FD-U4000-D Front Derailleur - 9/10-Speed Double 36/40t Max BLK/SilverExceptional front shifting performance for large wheel mountain bikes. Tackle trails with this Shimano CUES FD U4000 front derailleur's smooth operation and outstanding durability. Its extra wide range front double gearing and versatile 2x9 10 speed design give you the freedom to explore. ONLY Compatible with LINKGLIDE shifting system. Smooth and quiet shifting on and off the trail Provides and extra wide range with front double Offers wider tire