From my readings on the forum, a BB is needed to properly fit 33's. The stock 17's are 32.05 in diameter. I am looking at Nitto Grapplers 285/70/17 which are 32.76. Would these fall under the 33 category or 32's. Do you think I would have any rubbing issues. Also they only come in LT with a E rating. My f250 had e rated tires and I could never quite find the proper PSI that would give me even wear. I do not want to lift my vehcile, only want a more aggressive tread that is siped. Right now not many options for the stock 255/75/17. Actaully their are not any options with siped tires in a aggressive A/T.

 

The ride quality between E rated and D rated is very noticable. The E rated will give a much stiffer ride and unless you think you will need them for serious off roading, I would steer clear. They made a huge difference on my 99F250 LD. So much that I changed them out after only 2K miles. I think the Rubi's have E rated tires.

 

285's are classified as 33's. I ran 285/75/16 for two day's with no lift and had no problems. Today I installed a 2" lift and it really makes it look nice. Go with 33's over the 32's we always seem to want to go bigger

 

If you change your wheels out with 4 to 5 inches of backspacing, you'll be fine with the Terra Grabbers in 285/75R16. I have them on stock suspension and haven't got them to rub so far. With the 6 speed and 4:10 gears, its a great combo.

I am thinking about installing Rusty's 2 inch lift and a set of sway bar disconnects in the next month or so, both for looks and function.