Asus ROG Mouse GX1000 replacement wheel.

thingiverse

The thinnest part can break on this mouse, so you can replace it now. To place the wheel you'll have to open the mouse (6 screws), don't break the wires, remove the tiny pcb with leds from inside the old wheel (1 little black screw), remove the lower PCB (4 screws), remove the broken axis from the PCB component if it's still here, take the rubber band, the round stickers and the little cylinder from the old wheel and put them on the new wheel, place the new wheel, carefully push it in the component, reassemble your mouse.