No problem with putting on 20's except make sure the Wheels you want to put on will fill the wheel well nicely or you will run into issues with appearance of how the look on the vehicle. I had this problem but after putting on my spacers, the problem was corrected. The better thing to do would be to buy wheels that will fit correctly so you don't have to use spacers (imo). I have some new pics of my ride but I have yet to put them out. Maybe this weekend sometime.