Product details:

The new SRAM Red Front Derailleur changes everything. Instead of simply moving back and forth, the derailleur cage actually rotates to maintain a consistent angular relationship with the chain. We call it Yaw Technology, and it eliminates the need for shifter trim. As a result, shifts feel more direct, more precise, and combined with the new RED crankset and chainrings, delivers an unmatched performance advantage in front shifting. Yaw cage rotates in line with chain, improving the shifting speed and precision while eliminating the need for shifter trim. Integrated chain spotter protects your frame without adding any extra clunk, and adjusts independently of the derailleur itself. Weighs 74 grams. Available in braze on only.