Tire Wear / Tire Inflation Question

Jpjlauer wrote:
I have a 2006 30' Gulfstream BTCruiser on a Ford E450. My tires are Michelin XPS Ribs with about 25,000 miles on them - three years old and still in great condition.....Reason I ask is that I measured the tread just to see how they were wearing and found that both inside rear tires measured in at 9/11/9 and both outside rear tires measured in at 10/12/10 which to me indicates under inflation....

We presume your measurements are in 1/32nd's. That must be a record wearing only 2/32nd in the middle of the inners in 25,000 miles. Maybe I am jumping to conclusions that new they had 14/32nd's. I would agree with you that the wear pattern indicates them to be underinflated. How accurate is your tire pressure gauge? I would not exceed the maximum cold pressure of 80 psi for the tire and the rim.