A LOT of replies to tire threads recommend running the trailer (and I assume also car/truck/motorhome) at sidewall max psi instead of the dataplate psi. Why?
Our RV trailer axles are close spaced and in the center of the vehicle vs say a truck with the axles at the corners with the front set steering into the corner and the rear set following. Now watch the trailer tires as they slide sideways (side scrub) around the corner. This action is trying to tear the tire apart....so tire experts and experienced trailer owners have found max sidewall pressure gives their tire the best shot at staying together.
My trailer tires have a max psi of 120. The trailer dataplate tells me the correct psi is 80. So I follow the manufacturer recommendation 80psi. I figure they know better than anone else what's 'right' for my trailer.
If you believe that then no use asking us anything :). Anyhow.....
Somethings not right. I've never heard of a trailer mfg recommending derating a tire on their trailer by 25 percent. Doesn't make sense or
It sounds like some one has upgraded a ST235/80-16 E tire at 80 psi to a much higher rated tire. If thats the case the trailers tire data plate will not reflect the right pressure.
This from a good source when some one has over tired the trailer;
rvsafety.com
Tire Load and Inflation Ratings
Note: Towable โ Travel Trailer/ 5th Wheel owners Due to the severe use conditions experienced by tires when axles are very close together โ tire industry experts recommend maximum (sidewall) inflation pressure for towable tires unless this causes a sever over-inflation situation (20psi+), often referred to as the โbasketball effectโ. If this is your situation allow a 10 โ 15psi safety margin above the minimum required inflation pressure.
"good judgment comes from experience, and a lot of that comes from bad judgment" ............ Will Rogers
'03 2500 QC Dodge/Cummins HO 3.73 6 speed manual Jacobs Westach
'97 Park Avanue 28' 5er 11200 two slides