All Classified forums require a Site Supporter subscription. It is only $25 per year and you can buy and sell whatever you like on the forum. To become a Site Supporter, go to Your Profile and select "Paid Subscriptions."
Are you asking if you can put taller tires on the truck? If so, you can probably get away with 30" or 31" on a stock 2WD.
the new BFGs mud terrains have a tread pattern similiar to krawlers