SRAM Force AXS E1 Front Derailleur (battery not included)Developed and upgraded for superior performance, the Force AXS front derailleur isnt just fast and more precise while front shifting. Its silent in every single gear, too. The cage is narrower, allowing for less distance to move, especially on outboard shifts and shifting under big power. This derailleur uses SRAM Yaw technology with auto trim to ensure the fastest possible shift and quiet performance. Compatible with 46 33t, 48 35t, or 50 37t