A race car that'll fit a hot-wheels track. Overall dimensions are at scale of a typical car of this type. Movable wheels with a 0.3mm gap that most printers can handle.

Version 4 has the wheels lowered (body raised) by 1mm and front wing reinforced. I would suggest this version over v3.

Print instructions

Included is a wheel axles mesh that you should use to print with an infill of 100%. This is necessary to make the 3d print strong enough to take lots of abuse without breaking.

After printing if you want to get the wheels to roll well, use some sand paper on a flat surface and sand the bumps from 3d printing down, (roll the car back and forth at a 45 degree angle so the wheels get sanded but still spin)