Originally Posted by DHeffernan
I took camper out for a little test run and had tires at 70 psi on the way there and 65 psi . Got back and noticed a slight discoloration.
is this a result of overheating or is this normal? Bearings are good brakes or good . No resistance on axle.
70 psi doesn't sound like the MAX pressure molded on the tire sidewall of any Load Range I know of. Are you running +5psi over a LR-D tire with 65 psi MAX or are you running under-inflated on what I thought you had... LR-E tires.
No idea about overheating as you left out the important information like average ambient temperature, load on each tire, avg and max travel speed and length of time at speed.
The color looks like the normal surface of a relatively new tire with what is called "Wax Bloom" or the result of anti-ozone materials working to the surface to give the tire UV and Ozone protection. Removal of this will of course decrease the protection and increase the long term damage to the surface of the tire.
You can help protect your tires from UV and more importantly excess heat with the use of white tire covers
if you do not store the RV indoors.
You may be focusing on minor items and ignoring the "best practices" that can produce meaningful positive results in tire longevity.