[LXXV]

Hi everybody, new (used) X5 owner here. As the title says, just got a '06 4.8iS, and I'm looking into getting a winter set of wheels/tires. A buddy of mine has similar setup ('04 4.4iS with 18s) and the caliper clearance seems minimal, at best. I'm assuming the iS comes with bigger brakes all around than the 6cyl.
What I'm getting at...anybody else use 18 inch wheels and these brakes with any insight? Thanks!