I am getting a 4 inch BDS lift kit for my 2006 4x4 f150. It says that I need to have 17" wheels with 4 5/8 backspace, I was wondering if i could get 18 inch rims, with maybe 4.5 inch backspacing? Please let me know, thanks

 

Yes those will work. The minimum size wheel is 17", because your truck can't fit any smaller. And the maximum back spacing is 4 5/8", so anything less than that will work.