Hey Matt, I have been doing my own research into this issue so far as the wheels fitted to the rear of my BA do not clear Brembos (20x10'). The brand is Vertinni Sicilians.
To my knowledge so far is that most if not all 19x8.5 and 20x8.5' rims will clear Brembos. Both the 4 and 6 pot. But the staggered offset of 19x9.5 and 20x10' do not. I could be wrong but I have looked into over 2 dozen wheel designs so far and yet to find a staggered rear wheel that will clear the 4 pot rear Brembo.
G-Max Wheels (located in Perth and actually a manufacterer) have a great website of their wheel designs which have a good menu that shows what wheels will and will not clear Brembos. But thats just their wheels, not sure about other wheel company websites. But yeah, G-Max so far have clarified what wheels and offset do clear Brembos in their range, which maybe go to most staggered rear wheels. I Linked a picture of my rear wheel, just to show my lip and offset.
