TOP ROW, LEFT: Maybe you didn't know it, but this establishment wants your business . . . and its prices are right too! TOP ROW, RIGHT: These are just a few of the many tires that a typical auto salvage ,yard has to pick from . . . and they're generally all chalk-marked for size too. SECOND ROW, LEFT: Checking the depth of tread on a used tire is easy and anything over ;3/16"" is good.SECOND ROW, RIGHT: Note the good, uniform tread on the tire to the right . . . versus the uneven wear-probably caused by poor wheel alignmentexhibited by the doughnut to the left. ABOVE, LEFT: The wear bands (which show here as ""breaks"" in the tread ,grooves) on these two tires fairly scream that there are very few good miles left in this rubber.ABOVE, RIGHT: By simply pushing a tire down onto a rock, you can quickly expose its ""innards"" to inspection.LEFT: Why is this man smiling? He just saved over .8100 by buying his ""new"" tires in a used auto parts yard.