MWMULES is correct. We leave tires that are flat or low enough to wrinkle the sidewall on the truck. We do have some flats in the stack though, from CTIS trucks. It seems like we break the valve stem or a fitting in our rush to get them off of the truck. I have offered before and will still do it, if you are headed to Riley to pick up a truck sitting on a flat, stop by the yard and get a good tire and wheel, rather than drive off on an aired up flat. I would rather give away a decent 1400 or two than have to hear on the radio that a surplus truck from Ft. Riley blew out a tire and injured a hobbyist or somebody else. I offered once through a PM to give a guy two front tires for his recovery, later I read where he blew a front tire and hit a bridge. We used to air up 1400s and flat tow a five ton home on a tow bar, several times we blew tires. We now just haul them on step decks, whether they run or not. It was pretty slick though to take a semi with two drivers, load two and drive two home. Glen