I am running 20s all the way around and it is difficult to make them look right (although I hope I have achieved this). I had to use spacers and now since the wheels sit where they do, I can not lower the car. What is the exact size, backspace, and offset of these wheels.

And before you do anything, make sure to actually fit one up. I always thought with mine being 20x10 in the rear I would have problems - there is plenty of room, but up front, with that suspension nut there is none....