EcoboostKev

Finally bit the bullet and bought some new Toyo's(285/55/20).. Just wondering what some of you are running for air pressure?? The new tires have a max rating of 80psi compared to the stock P-rated tires that were only around 45psi.They only put 35psi in the tires since that's what is on the door sticker. But I'm thinking it should be higher?? I'm not really worried about a harsher ride with more air pressure. I just want to know what air pressure to keep them at to get the most miles out of the them.
Thanks,
Kev

RES4CUE

I played around with mine and settled at 50psi

PawPaw

I've always had good luck running 42 to 44 psi cold. This would be for everyday use...towing or carrying a heavy load you can always air them up.

Tothemax

Go closer to 80. If you don't like the ride, decrease until you do. Watch for tire wear though.

Spectragod

My 3/4 ton trucks and vans with 10 plys take 80 psi in the rear and 60 in the front.

kjo43

60 front. 55 rear. works for me under normal daily driver activity.

RES4CUE

I wouldn't max them out unless loaded!

11lim

Check out the Super Duty forum. Lot's of threads on 10 ply tires and different pressure they run. I had a 2011 F250 SD with the 6.7 Turbo Diesel engine. I pulled a 12K lb toyhauler. My tires were 10 ply on the truck and called for 80PSI rear and 65 front. I only ran 80 PSI in the rear while pulling the Trailer because of the heavy tongue weight. When I wasn't towing I ran 60 front and rear. Some on the Super Duty forum said they run 50 PSI front and rear when not towing.

RES4CUE

Only problem is that we have F150s which weigh less than the 250.

I started at 40 and moved up until I hit 50 and it's a good compromise of ride and tire wear.

Ckhris

Keep it at 35 unless ur towing. Why beat the crap out of urself with a stiff ride when you don't need to.