I recently purchased but have yet to install a 3.5 inch rock krawler adventure series lift. On their website they recommend 3.5" backspacing when running 37s. What is the reason for this? Is it rubbing on the control arms? The only wheels that I can find with 3.5" backspacing are beadlocks (which I don't want). Will 4.5" bs wheels work with this lift?