Ive got a 04 single cab sittin on stock 16's with 285 procomp mud terrains and im lookin to go a little bigger because i cant hold traction with that PPE cranked up. What i really want to know is if i crank the torsion keys up how big can i go? Would a 315 be possible? or maybe even a 305? Any help would be great, Thanx Alot!