Best tire pressure for unloaded 350 DRW

[jspaulding37918]

I am having problems with vibrations in my truck. I have replaced all 6 tires, all 4 rotors and have had the tires balanced multiple times. The only thing I can come up with is that the factory tire pressure recommendation is too high for a truck that runs empty 99% of the time. I am running a slightly wider (265/70-17) than stock tire but still have about 2 inches clearance in the rear. What is a safe tire pressure to run so that the rears don't rub and I get a smoother ride? Thank you.

Josh

 

[nvrsatisfied84]

when do u get vibration and where do you feel it the most at ?

 

[jspaulding37918]

it seems to come mostly from the rear at highway speeds 55-60 mph. It gets worse the faster you go.