I am 6'6'' and 330lbs and have concerns about the stress on the wheels with ANY load. I can see that from some of the tire pressure calculators on the net that I should set the tire pressure to ~152lbs (37mm tire). According to my tires the max pressure is 85lbs (New Surly Disc Trucker with factory continental contact tires) so is there a touring tire that can handle the extra pressure that I need? Should I increase the tire size and if so what tire size and model should I go to?

I tried searching the forums/net and I have not been able to find info on what to do.....I am sure there are big guys on a tour who have run into the same issue.