What are the weights on Front and Rear Axles?
I use 265/70/17 'E' tires
I run 55psi Fronts (all the time) ~4200#
I run 45pi on Rears when NOT towing ~3900#
I run 80psi on Rears when Towing (Max Load) ~6200#
Even thread wear across width of tire, no cupping, get 60K PLUS mileage and I don't rotate tires
Personally I think 70psi rear is too much air pressure .....will be over-inflated when not towing/hauling and center threads will wear quicker.
60 psi Fronts even with diesel engine weight is probably a bit higher then needed.
