Looks like wired.
When I can find a screwdriver that will fit the front body hold down screw, will open and check!
The only other car I got that climbs like this one is my iRacer. But have not hop up the ohter cars.
On slick surface it really pulls but a more gripping material its pretty strait in travel. So its steering is not as good as I first thought. Oh well!
I saw the other type people have talked about but that was months ago.