21cm Hamster wheel with ball bearing

You will need 300g of filament, 12 hours of print time, an M5 nut and M5x25 countersunk bolt and a 42x30x7mm ball bearing. Please enable "External perimeters first" https://help.prusa3d.com/article/layers-and-perimeters_1748#external-perimeters-first to make sure the bearing will fit. It should be a thight press fit in the hamster wheel, otherwise you will need to glue the bearing in. I also uploaded the Fusion 360 file, so you can change the model.

You might want to add a heavy wood base plate to your wheel and a soft foam lining for your little hamster feets.