If anyone can help answer this before I make the purchase, I would really appreciate it. The tires shops dont seem to know squat about it. I have an 07 4wd suburban with stock 16's on it. I want to change the wheels to 20's with a 285/55 R20 tire. Will they rub, especially when I am towing my travel trailer? Its about 7K lbs. Thanks to anyone that can help.