[tentcamper]

I have the same tire. I inflate them to 65. But if I was not driving at times over 65 MPH, I would inflate them to 55 PSI. But I run my tires with extra PSI's

The right answer is read the goodyear tire chart below and calculate what your PSI should be. You should inflate them to the right PSI per the load that you will be carrying on each tire. Don't forget to reduce your tongue weight.

Goodyear a few years ago had a service bulletin stating that if you were going to travel faster then 65 MPH to add 10 PSI to the inflation chart. That is what I have done with my tires because at time to time im over 65
MPH.