dry truck weight

Sport45 wrote:

Dayle1 wrote:
On a similar line, when people ask about what PSI to use in their trailer tires, the most common answer seems to be to inflate them to the max PSI on the tire sidewall. I can't recall anyone referring to the sticker on the side of the trailer.

That's because heat/UV/Road Hazard/ect kills trailer tires long before the tread wears out. Keeping them at max cold inflation pressure lets them run a little cooler. They also roll easier, saving some fraction of a mpg. Again, the tire won't last as long as the tread so it's best to get all you can out of it.

Good points.
I would add tire on our trailers side scrubb around each corner and while backing. This action in very hard on the tires internal belts. Watch a 80 psi rated tire with say 65 psi in it under these circumstances ....... the tire is very distorted. Now air it up to the max sidewall and watch it on the same scenario. The tire has a much less distorted shape and less internal belt stress. Tire damage is cumulative.
Out trucks with tires at the corners where the front set steers and the rears simply follow don't have a side scrub issue like a close spaced axles in the center of the trailer.

Door placard inflation pressure recommendations are a good starting point. Watch the tires wear pattern on the rear and on the front and fine tune for the best pressure and best wear. I air up the rears when towing or carrying loads but drop the pressure down to the 45 psi range when empty. None of my other trailers or the RV add weight to the trucks front axle so I leave it at 65 psi 24/7.

Your trucks tires and loads will be different so fine tune them for their best wear pattern across the tread.