Quote:

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If the outer edges of the tire are only being used than you don't have enough pressure. Conversely if the center is the only part being used than you have too much air pressure.

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that is what we used on the firestones, that didn't work on the M/T Tire ressure and 60 ft. times is what your going to have tomake the decision with. I use to slide my fingertips across the tire with very light pressure, if the edges(on NEW tires) where smooth and the rest of the tire was rough then I let some air out a little at a time until the roughness was the same and the time slip showed a good 60 ft. If the edges where rough and then went smooth and then rough in the center and smooth before the edges on the other side of the tire and the far edge was rough I would pump them up 2 oor 3 lbs or more as needed until I got a constitent texture all the way across and better 60 Ft times Ultimately your going to have to figure what theses tires want on your car