You can always rely on the GX Eagle 12-speed rear derailleur by SRAM
The SRAM GX Eagle rear derailleur for Eagle 12-speed cassettes with up to 52 teeth is robust and performs smoothly and precisely in every situation. The improved cage design optimises chain guidance and allows for immediate shifting. The rear derailleur was designed for cassettes with 10-52 teeth, but is also suitable for cassettes with a gradation of 10-50 teeth.
