mini tub diff width

[Todd in vancouver]

Being new to the PT build I'm presume there are many ways to get the results each person is after. My understanding and the way I planned my build was to do the mini tub while I was replacing quarter panels, assemble an install my rear suspension set up, then measure and order the rim & tire combination to fill the big hole I just created. Is that not why I'm going to have to order a set of these super expensive PT type wheels I keep seeing on these builds?