We are talking about clearing the fender.I’m confused about your advice tho. Wouldn’t inner clearance INCREASE with LOWER offset since the wheel (and tire) center is moved outwards?
Yes, there would be less inner clearance, but IIRC, there is enough room in the rear. Just jack up your car and reach back there to feel how much clearance you have. Deduct from that number based on offset and tire width.