It is kind of a personal taste issue in most cases, or dependent on how you intend to use your Jeep. Mine came from the factory with 215/75/15 but the PO put on 31x10.5x15 Pirelli A/T tires. I needed something more aggressive to get around the ranch when the Texas black clay turns to Texas Black Sloppy stop in your tracks mud. The 31x10.5
tires fit perfect witn no lift....I think they look pretty good also. I did install wider fender flares to block any mud sling. The only down side is my speedometer is off by 9%
if the speedometer reads 60mph I am in fact running 65mph. I have the 3:07 gears.