BBS RX I's 16in on mine.
They're pretty close to the arch tbh and that's with rolled arches. I'll probably raise it slightly for winter and pull the arches for a bit more clearance, I've lowered it a lot since the pic' in my sig.
I've had loads of wheels and BBS are extremely strong and buckle resistant (we have some monster potholes up here) so I'd highly recommend them.