You can't trust the dimensions given for the trads. I dug around to find the truth for my book, where I made that distinction.
From memory the 4010 trad length is with full bumpers (I'll have to look it up).
The width of the Trad varies whether with wires or not, and the 4/4 is almost as wide as the Plus 4 because the widest point is between the wheel spinners, whereas with the Plus 4 and Roadster the width is to the edge of the rear wings, remembering that the rear track is wider than the front.
The Aero Plus 8 dimensions ought to be clear cut, because there are no significant wheel options which would affect width, and no bumpers which would affect length. But the only way to be sure how big the Plus 8 footprint is.....is to measure one.
