Skate Board mount for a 70mm Dia wheel. G-Code is for PET-G but could be re-sliced for PLA. I used 4 perimeters for a decent wall thickness, and 8 layers top and bottom, so it should be plenty strong enough. I hid the Z-seam in the radius at the back of the model so it should be well hidden.
I used 2 to hang a board but you could use 4 if you want to keep all the wheels off the walls.
The idea came from this, but I needed something that fits on a MINI+.
The author hasn't provided the model origin yet.