SRAM RED AXS Front Derailleur - 2x12-Speed Braze-on Battery Not Included BLK E1Not just fast and reliable front shifts but silent running across the whole cassette. The RED eTap AXS front derailleur uses Yaw technology with electronic trim to ensure the fastest possible shift while eliminating chain rub in all combinations with the easiest setup around thanks to a brilliant new tool. AXS enabled for easy wireless setup monitoring personalization and reliability Refined cage shape results in faster and more accurate front shifts