For visual reference, I have the fake Fuchs (5x130) at 15 x 5.5 with 3 .75" backspace. For the outlaw look I wanted wider lower profile tires, so I use 185x60 tires. 18psi in front, 22psi in rear. Click pic to enlarge.
That's a great look which is why I wanted 185's on my wheels too, but apparently not a good thing to do on 4.5" wheels.