Comment by edaemon

Yeah, it's interesting that their FAQ [1] just says it can fit "full size sheets of plywood" and their specs page [2] also does not list the actual dimensions, only the volume. A 60"x43" bed would technically fit a 96"x48" sheet, but you would have to lean one edge against the side of the bed.

That said, the article you linked appears to list the bed width at the wheel wells. They say the Maverick's bed is 42.6" wide but above the wheel wells it 53" wide or so. You can find plenty of pictures of people hauling plywood with one. I suspect the Slate is similar.

[1]: https://www.slate.auto/en/faq

[2]: https://www.slate.auto/en/specs