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 hooked up to truck.
Forum Discussion
- A tire guy that doesn't know his stuff...
Rated PSI is COLD. Tire manufacturers already factor in PSI increase with temp. Sandia Man wrote:
The tire engineers have already factored in the psi increase when a tire is running under such conditions. If it is an ST tire I would air them up close to max as they tend to perform better and not heat up as much. If these tires are LT tires they can be set to a psi commensurate to the load they are carrying.
X2- The standard answer is to use the maximum air pressure noted on the side of the tire. Engineers design tires to handle the additional pressure from heating and altitude changes.
- The tire engineers have already factored in the psi increase when a tire is running under such conditions. If it is an ST tire I would air them up close to max as they tend to perform better and not heat up as much. If these tires are LT tires they can be set to a psi commensurate to the load they are carrying.
Shoe2728 wrote:
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 hooked up to truck.
There is inflation charts for given weights. some chose to use them ,others chose max inflation, and claim no issues. I lean towards the inflation charts. I never run max cold inflation . Normally max inflation for max weight rating- As usual more info would be needed to answer your question!
Did you upsize your tires?
What is your RV?
Did you replace with same exact size and load range?
How much weight is on each axle?
Is 9,000# the weight on the ground or the total weight of the RV?
What tires did you buy? Size/brand.
