Warhorse can upgrade to 33'' or 35'' BF Goodrich KO2 tires. Also, Warhorse can match your vehicles wheels and tires and adjust the bolt pattern. 

Standard wheel/tire combo below:

Wheel: Rough Country Black Steel 15'' Wheel, 6x5.5 Bolt Pattern

Tire: 31'' Pathfinder All Terrain

NOTE: 35's fit great with straight axle and CRS2 suspensions. 35's won't fit with Timbren suspensions.