My first car was like this...
I'm not totally sure I understand what the Q/E inputs do...
I like how the chunky wheels help you get traction on rough ground, there's definitely something here if you want to expand on it!
Viewing post in WheelClimber jam comments
The pins start up and locked. If they are down, the corresponding wheel (front or back) will shift with the weight of the car (wedges touching the ground get smaller, and the wedges on the opposite side get bigger). If the pins are up and locked, the wedges don't shift size, so you can lock in a specific tire shape.