I am looking to upgrade to 20x9" Ballistic Havoc wheels on my stock suspension 2012 FX4. I need to know what size tires would best to put on them and not have any rubbing. The recommended stock size is 275/55R20 but was looking at either 285/65R20 or 275/65R20. There are more brand for the latter size but I cant lift my truck because of the warranty. Any help is appreciated.

 

What is the offset/backspacing on the wheels?

 

offset is +15 and backspace is 5.62 inches