Tire inflation
Got E rated tires installed, 80psi max, Tire guy said it would be better to run around 65-70 psi as tires heat up. Always thought I should run max cold rating 80psi. FW weight is around 9000 lbs hooke...
Forum Discussion
Shoe2728 wrote:
I had St 235 80R 16E went to BF Goodrich Commercial T/A All-Season 235 85R 16E GVW of FW is 12000. I have looked for a pressure weight table but mostly all I fine is max inflation rate is 80 psi. I have a 2011 crossroads cruiser 305skp
Your OEM tires had around 3500 lb load capacity at 80 psi.
The LT235/85-16 E tires your using are rated at 3042 lbs capacity at 80 psi.
Your going to have to use max sidewall pressure to get the full 3042 lb capacity which is recommended for tires on a trailer anyway.
Our RV trailers with close spaced wheels in the center on the trailer have tremendous side stress placed on them as they slide sideways around a corner.....unlike a truck with tires at the corners with the front steering into the corners and the rear set following.
And of course most folks know know about low pressures = more heat generated at highway speeds.
So don't be fooled by truck tire pressure needs.
Apples vs oranges for your trailer.
Goodyear Tire and Rubber says .... weighing RVs
Special Considerations
"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."
and if you have over tired the trailer then this web has some excellent recommendations;
rvsafety.com
Tire Load and Inflation Ratings
Note: Towable – Travel Trailer/ 5th Wheel owners Due to the severe use conditions experienced by tires when axles are very close together – 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 ‘basketball effect’. If this is your situation allow a 10 – 15psi safety margin above the minimum required inflation pressure.
