just a osha tid bit about heavy duty tires.when filling heavy duty tires you must use a clip on chuck that enables you to stand outside of the trajectory.when removing a flat dual you must deflate the tire while it is still bolted to the hub.you should never fill a flat tire above 10psi with out it being secured in a tire cage or bolted to the hub.proper ppe and inflation devices and cages are to be provided by the company along with traing and refresher training.never inflate a tire that has been run flat with out demounting it off of the rim and inspecting it first.I train my guys every year and will go over it off and on through out the year.these heavy duty tires can split a person in half.The air force shows us the pictures every year of what happens when you dont follow the rules and its pretty grusome.