mike-s wrote:
P275/55*20 is good for 2216 lbs per tire at 29 psi. So, about 4500 lb on the rear axle @30 psi. What's the RAWR? If less than about 4500 lbs, more pressure won't get you more capacity. And, I'll bet it's right around 4500 lbs - manufacturers spec tires and pressures to support the ratings they give. If the sidewall max pressure allows it, I might run an extra 5 psi when towing, but not more for treadlife.
The sticker is missing on the door (thanks previous owner), but AFAIK the GFAWR is 3600 lbs and GRAWR is 4000 pounds.
You're thinking 35psi front and rear, instead of 35psi front and 40psi rear?
