b_line
Well-Known Member
That all sounds great, except the airless tire. Air pressure keeps a tire round, even when there is uneven wear. I'm not sure how an airless tire could maintain it's shape.
It's called a drive flat. It's only good for like 100 miles or something. It's got rigid sidewalls so it doesn't need to be round. But it can't be driven forever like that. It is just a remedy so you don't have to put a spare on.