SRAM Rival AXS Front Derailleur - 2x12-Speed Braze-on Battery Not Included BLK E1SRAM Rival AXS Front Derailleur 2x12 Speed Braze on (Battery Not Included) Black E1. Experience elevated front shifting. The Rival AXS front derailleur uses SRAM Yaw cage movement and auto trim for silent rasp free running and a narrower cage shape that integrates with our X Range chainring design for fast clean shifts. Our setup tool means youll get the ideal position without any fuss too. Compatible with 46 33t 48 35t or 50 37t chainring