The Ultegra R8000 11-Speed Front Mech evolves to provide an ultra-smooth shifting action that flawlessly moves your chain up and down whenever required. With zero delay, you can enjoy a shift that is crisp and concise. With an improved link construction that accurately mimics the force curve of the hand action during the gear shift, you can be sure of a smooth swinging action across the chainset, providing that measured and precise movement that you need to engage and drive onwards. Compatible with chainsets with a top end range of 46-53T, this front derailleur is a braze-on, assuring you of a rigid and stable base.