I agree, a blowout would be costly, for when a tire comes to pieces it always tears up something, and they've got lots on that truck that can be torn up.
I believe in the article that it stated when you get on the road it lowers the front end so that you have will have less air resistance, yet even with that at the height it shows most anything laying on the highway will hit the front of this truck.
I once hit a deer in about a 72 or 73 Conventional KW that had a stainless steel bumper, it bent the bumper just a bit, but on that new truck if you hit a deer it would be a costly fix. As for the bumper on that Conventional KW we were able to bend it back so that you could hardly tell it had even been hit by a deer. They sure do make them much more costly to repair whether it mechanical or other wise.
How I understood the article is that is the highway speed configuration, I've seen other stories on these where the vehicle would raise up and skirting retract at city speeds. City buses do all that now.