Originally Posted by dhvaughan

the most common sizes are 225, 245, 265, 285. some tires brands are available in the in-between sizes, some are not (or hard to get, or more expensive).

about the largest tire you can run on a stock 4wd with no lift and no rubbing is a 285/75/16. 2wd might be a little less. rubbing on control arms would be caused by the wider width (285+) rather than the height ratio (70 vs 75).

here's one of many tire size calculators.
http://www.1010tires.com/TireSizeCalculator.asp

Originally Posted by notanexit7

The biggest tire you can fit on a 2wd is 265/75/16, they're on my truck now. They way my truck eats through tires I'm going the re tread rout next time. Tired of spending 700+ on tires and my truck chops them up.

Originally Posted by Polishdog

Thanks for the info - I think the 265/75/16 is fine for my truck; I have had good experience with the BF Goodrich Long Trail T/A. Had them on another truck way back - the tires were quiet and lasted a long time.

Why does your truck eat through tires? Could there be something wrong with the suspension or alignment?

Originally Posted by 97black_ram

I got a few thousand miles on my retreads so far. Got the 265/75/16 guard dogs. They are doing fine in the snow so far.