My stock 4x4 98 has 235 15s on it I've been kicking around the idea on ordering 31s. But they are only in a 10.5 tire. Could I order a 245 70 or 75 and have just a tad bigger then stock and still fill it out some ? I'm going to order the goodyear duratracs

 

I would stick with the 235-75-15. If you the bigger tires they will rub when you turn. It just gets annoying after a while. Goodyear wranglers 105s are $74 a tire at Walmart. Ride smooth an very good traction/tread life.

 

I put on 255/70/15 tires. They fill out great and they are 10 wide tires so you get a better foot print. Also I don't rub at all.