Originally Posted by Mr P!nk

I know the cup racer is an M-sized chassis, that's why I'm confused too, because I can clearly see the cup racer motor mount through the windows, plus the cup racer is the only car I know of to use a screw instead of a nut to hold the wheels on.
Maybe he's just playing a trick on us and the back wheels are just free standing in the rear arches, tricky tricky. Either way I'm just curious that's all.