The wheel on the Cubii JR2 often breaks, and the machine has been discontinued, and customer support no longer offers replacement wheels. This file is designed to reuse the metal bearings from the old wheel. Use a rubber mallet and the tool.stl to center the bearings into the replacement wheel.

The wheel should be printed without supports with 20 wall loops, which will print it as a solid wheel. It is quite small, so it should print quite quickly (20 minutes on my Elegoo Centauri Carbon), and it uses about 11.5g of filament.