Tire pressure

WrightOn wrote:
My new to me unit has Load Range G tires that indicate 110 psi cold max. I used it last year over 2000 miles at 80 psi as that was the pressure leaving the dealership. I’m headed out from Illinois to Maine this week. Do I jack them up to 110, keep them at 80, or somewhere in between?
Thanks for your help.
Brian

Per Goodyear:

"Unless trying to resolve poor ride quality problems with an RV trailer, it is recommended that trailer tires be inflated to the pressure indicated on the sidewall of the tire. Trailer tires experience significant lateral (side-to-side) loads due to vehicle sway from uneven roads or passing vehicles. Using the inflation pressure engraved on the sidewall will provide optimum load carrying capacity and minimize heat build-up."

Reams of information here by a tire engineer supporting sidewall cold inflation pressure as being optimum to reduce interply shear.

http://www.rvtiresafety.net/search/label/Interply%20Shear

If you don't know the weight of each wheel then you should run 110 psi. unless you know they are way oversized tires for the RV.


If the GVWR is over 15K I would run 110.

I read this on etrailer.com ——->

You always need to keep your trailer tires filled to the max cold psi rating. If your current load range G tires have a 110 psi rating then that is what you need to keep them filled to.

Tire blowouts are a result of damaging a tire (like hitting curbs), under or overfilling a tire, exceeding the speed rating for the tire, exceeding the weight limit, or even messed up suspension parts.

For example, the Provider ST235/85R16 Radial Trailer Tire # TTWPRG235R16 has a load range G which is 4,400 lbs at 110 psi for a single tire application like what you have. It also has a speed rating of M which is 81 mph. If you don't have the tire filled to 110 psi then it will get hot quickly and can cause a blowout. Most trailer tires have a speed rating of 65 mph so if you were exceeding that speed limit then that would also explain the blowout.

Weight of your trailer on axles divided by number of tyres = xxxx find tyre pressure chard for your tyres and it will tell what pressure to run them at.
Frank

If you want your tires to be capable of carrying their maximum weight, inflate to the sidewall maximum pressure. Few dealers are careful with the/qualified to determine weight and the correct tire pressure. The “lot boy” doesn’t care.