What's the width of the rims? It they already have 255/70/15's on them, they should be wide enough for 31x10.5's. Are you doing any kind of lift or leaving stock height?
I do have BFG T/A KO 265/75r16 on stock wheel and they do rub a little at full lock on the sway bar......no much but they do ''clean'' the sway bar! Oh! I have TT too....
I want to leave it at stock height if i can. I just dont want it to rub real bad. i dont know the exact width of the rims i just know the tire size on them right now.