This might seem like an easy question, but what is the widest or best recommended size that the early FG XR6 Utes can run without having to roll the panels and still have a good fitment with no guard space? I am looking at getting a staggered set up with 11" width in the rear and 9.5" width in the front...

Im asking because I am new to the Ford community and I want to fill in the rear wheel gaps on my 2009 FG XR6 Ute which I just got, also can the FG Utes fit 20" inch alloys or only 19" inch?