I am running Varrstoen's 18x9.5 all around +15 offset w/ 235/40/17 all around clear the 30mm z brakes nicely.
I would recommend a little bit more stretched tire if you are going to do a nice drop, and be prepared to address fender well rubbing, as well as putting your harness as HIGH as possible. I ran into some issues there. I am running d2's.
I do have a question though. I am about to convert to 5 lug, and change wheels.
Does anyone know if a 17x10 all around +20mm offset all around will clear z brakes? I ordered a set of 10mm spacers just in case, hopefully that is enough. Just wondering if anyone knows. I haven't been able to find a for sure answer....