Wheels
My daughter asked me to print her some wheels for a car she was making out of a toilet paper tube. This model is the result. May it serve you well.
The axle is meant to be press-fitted into the wheels. In reality I suspect some sanding will need to be done to make that happen since the axle is the exact same size as the hole in the center of the wheel, but it shouldn't be too bad.
As of right now the first set is still printing. 4 wheels and 2 axles will take about 40 minutes on my Monoprice Mini Delta according to Cura. Which, of course, means that it's going to take closer to 50, but still a pretty quick little print.