Ok can't seem too find the right answer, I'm looking at getting 20" Vossen for my g37xs coupe, car will be dropped about an inch on eibach springs, what offset should I get for the wheels if all 4 are 20x10.5, they need too clear the brakes and not hit the fenders.

 

Shoot a PM to Diego@Vossen he's done plenty of aggressive square setups on the Gs, and it may depend on which Vossen you're wanting as far as adequate caliper clearance w/ certain offsets.