just order Terra Grappler LT285/70/17 load rating E. Max psi is 80lbs per Nitto. Didn't know if any is running these and at what PSI. Seems that 50-55 psi for normal driving conditions should be ok after doing some searching. Any help would be good.

 

You shouldn't need anything higher than 50, even loaded. If you go lower, don't go below 45.

 

45psi seems to be the norm for most guys running that size. Kind of depends on the ride you want to get. I would start there and then adjust up or down depending on the ride you want.