larger tires on hf frame

Anyone thinking of putting on larger tires on a hf frame may want to check the wheel/frame clearance. I just tried and found out not only did it give only about 1/4" clearance, but they also rub on the hanger bolts for the springs. ( it came with 12",5.30, I tried 15",205 75) I guess I will have to try 14"s or 13"s ( I hate the look of the 12") 
