with the 15x7 wheels you won't get enough tire on it to worry about tire scrub. If you want a short tire try a 245-60. It squats nice on that rim but leaves the fenderwell extremely open(you could put your head between the tire and fenderwell) The tire I've seen that works real well on that rim is a 255-70. it's about 28 to 29 inches tall and sits pretty good and square on the rim without needing to screw around with air pressures. You didn't say whether your truck is going to be dropped or not but either of these will do fine.