[kyleb]

The Newell applied sticker in the engine compartment recommended 90 psi in all positions which the weight chart agreed for the steer axle. The sidewall max pressure for a G tire is 105 - that pressure yielded the best handling on mine.

I recently installed Firestone FS561  (11R24.5 - H) on the drive & steer (Michellins were moved to tag) I'm still running 105 psi.
I mounted them myself & put a 10 oz bag of balance powder in each tire. The result is a glass smooth ride - when road conditions permit . . . . 

I have no idea if any of my efforts will be repeatable . . .