Hi everyone... I have a 2007 GMC Sierra Classic 3500 Duramax/Allison dually.  I recently bought 4 new rear tires, Firestone Transforce HT 215 85R/16, Load Range E.  I looked up the load rating for these tires and it's 2,760 lbs per tire.  That's 5,520 lbs per side, and over 11,000 lbs total capacity on the rear.  Two questions:  1.  Is that enough weight-bearing capacity to pull my new Cameo 36FWS (it'll weigh around 16K when loaded), and 2. What's the optimal front and rear inflation pressures while towing?  Thanks.  Jim

I would think that is more then enough.  The pin weight is generally 15-25% of the trailer weight, most people use 20%.  Roughly 3200 lb pin weight plus weight of truck rear axle I think you will be well under the 11k tire rating.  The only true way to find the pin weight is to have it weighed. 
Use the tire pressure recommended by the manufacture, should be inside the door.  You can adjust tire pressure after you weigh the rig and truck.

See you down the road and congratulations on the new home.

Stay Safe

No question you will need 80 lbs of air pressure. There is no other opiton for this. chevman

You should use the pressure shown on the door sticker, especially for the rear tires. We lowered the front tires by 5# to soften the ride, but the rears need the maximum recommended by the truck manufacturer.