The Sram Red 22 Braze On Front Derailleur changes everything, including offering every gear combination with no chain rub or rasp. Instead of simply moving back & forth, the derailleur cage actually rotates to maintain a consistent angular relationship with the chain. Sram call it Yaw Technology, & it eliminates the need for shifter trim. As a result, shifts feel more direct, more precise, & combined with the Sram Red crankset & chainrings, delivers an unmatched performance advantage in front shifting.