dry truck weight

kaydeejay 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.

Because trailer tires are spec'd by the trailer manufacturer to be able to JUST carry the load on them when the trailer is fully loaded.
At this load they SHOULD be inflated to max sidewall pressure.
The recommended pressure on the sticker (for OEM size tires at least) will probably agree with the tire sidewalls.
Unlike an empty truck, the empty weight of a trailer is still up there and the load on the tires will not be a whole helluvalot less percentage wise. No need to reduce pressure for that.
Plus of course, once the trailer is loaded with all your stuff (except perishables) it will probably not vary that much from one trip to another.
OTOH I DO adjust my truck tires. I run 70psi rear with the fiver on, reduced to 45psi when unloaded. I do not adjust the front tires as the weight on them hardly changes.
These pressures are 5psi higher than the tire pressure tables suggest for the loads I am running.
The empty ride is much improved with the rear pressures reduced.

Same here. I do run the fronts higher on my Dually at 80 because I don't rotate front to back just side to side on the fronts. Seems to wear more even with a bit more pressure. The rears at 45 solo and 60 loaded wear evenly.

On the newer Mobile Suites they are using GY H 17.5's and have a lot of excess capacity. I will be running 110 instead of 120MAX on new MS 39' on order. I run 105 on current 36' MS with the 17'5's I added and with many thousands of miles I have even tread wear.

Agreed MOST RV's should run MAX psi.