Being all wheel drive, Do I need to buy 4 all new tires? I have found a replacement tire of the EXACT brand and size. Its tread depth left on it is said to be 7/32. I dont work at a tire shop, so I need opinions from someone who does, or knows the answer to this. I measured the tread depth on the ruined tire, and in the middle of the tire it is at about 8/32 or a tad more, and on the edge it is 6/32. Also just from pictures of the online used tire, it seems to look MORE worn than my ruined tire. But according to the measurements they say its not. Granted I dont know the science of measuring a tire's depth...but I dont think its brain surgery. Do you measure from the center or the edge? Even if I buy a BRAND NEW exact replacement tire, its going to be taller. So what do I do? The reason for this is brand new the tire is 200-229.00 to replace. The used one I can get for about 50.00. With this logic, on an awd car, its bad to have one tire smaller than another because it will spin at different speeds. Thats what I have read on here. But with the same thinking...How in the hell can I turn corners without destroying the differential? tires turn at different speeds all the time.