Print the shafts horizotally for better performance. It is better with brim used.
The front shaft is 1.5mm shorter, so pay attention.
After printing, you can glue the wheel and shaft together, but it is tight fit, so maybe you won't need the glue.
The author remixed this model.
I made a shaft, that goes thru the front and back of the car for wheels.
No bearing is needed, and wheels wont fall off.