My personal opinion, i would leave the tires stock size, and go with a bridgestone mud.. but that is only because of family experience with bridgestone vs. mitchlen tires
the bridgestone mud is rated at 2245 with a 265/75/16, 3305 with a 285/75 16
then the dunlops are rated at 3000 lbs with a 265/75/15, 3305 with a 285/75 16
And just as a side note, the tires on your bros f-250 are rated at 3042 lbs.
Edit: knowing your inferiorority problems, I would go with a tire of at least 3055 lb rating so that you have one up on your bro.. I love hearing all the reasons why your 360 dodge is better than his powerstroke :flipoff2:
I have had good luck with the Big-O X/Ts I had run. Their 315.75.16's I had were 3045 lb each and wore really well and the tread is a cross between and AT and MT design. Did good in mud, rocks, trail running. Strong sidewall and wore even. I put 40k on mine wiht a rear locker and my buddy that bought them put another 10k before they had to be replaced.
They are fairly quiet and fairly inexpensive for the size/tread. Also, Big-O has a kick-ass warranty, especially their road hazard.
Get a leveling kit for the front and run the 315/75/16's and call it good! Discount tire has a few options on tires in that size.. I don't know if you can get them in the same load range d, as you have though, are you going to be towing alot?
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