Tires: Proper Tire Care/Inflation, bridgestone dueler tires, maximum inflation

Question
I bought a 2004 all-wheel drive 1500 Suburban new  (It is my fourth Suburban).  It came with Bridgestone Dueler tires on it.  I had no time or extra money to take them off in favor of something percieved to be better.  Imagine my astonishment when I ran these for 82,000 miles and still had acceptable tread left.  However, because they were passenger tires and I did a lot of heavy hauling and trailering (avg. 6,000#)they cupped out badly and became rough riding and noisy.  I attribute this to improper rotation and the fact that they were P-Metrics.

I have just put on a new set of Bridgestone Dueler  Revo LT tires with a vow to rotate them frequently and properly.  These are 10-ply, 17-inch tires with a maximum inflation of 80 psi.  The tire shop said to inflate them to 40 psi for stability and ride.  My mechanic said to inflate them to at least 60 psi for better wear and stability without hurting the ride.  The door sticker on the Suburban reads 32 psi (which I find ridiculous!)  I tried both 40 and 60 around town the first few days and have settled on 50.

What is your best guess as to proper inflation on these very expensive "skins"?  I am not above changing cold pressure when I'm about to embark on a long trip pulling the trailer over the Rocky Mountains and then down across the Mojave Desert.    I live in the center of the USA in Indianola, Iowa, near Des Moines (elv. 984 ft.)  Interstate 80 has become far too familiar to me in all kinds of weather.

Thanks in advance, Simon Stanfield

Answer
Hello Simon!

Well, in answering your question I agree totally with your mechanic in regards to the air pressure. When driving around normally unloaded use 60 psi as a minimum and when trailering or loading use 80psi. I very strongly recommend rotating your tires every oil change and have the alignment checked every other time or every rotation( I have both done every oil change and just replaced my Revo's at 64,000 miles with 5/32nds left on them and fairly even wear). Any company owned Firestone location will rotate them for free because they are Bridgestone tires even if you didn't by from them.
If you have any other questions feel free to ask!!!

Good Luck!
Andrew ;)