Anyone found a way to mount the newer 50tooth 11 speed cassette with the Sram GX rear mech
Wondering if the Goat link or something similar is the answer

I put a 50 tooth sunrace and NX mech on my daughter’s bike. No extension arm thing needed. Shifts as well as an NX derailleur can.

@ocrider did you have to adjust b screw or anything

The b screw was long enough to give the correct gap between the jockey wheel and the cassette. It can be stubborn changing down from the 50 to the 42, but as I was always told to double click on the shifter when changing down, she’s learning to do the same.
FWIW she’s 11, on 27.5 wheels and has a 32 chainring and rarely uses the 50. To be honest she’d be fine with the 46 cassette, but she’s reassured that there’s always that bail out gear for big climbs on longer rides.