so wait on BMW's there is a screw holding the rotors in place? that seems so stupid. On my truck you tighten up the lugs then take the wheel off, and the rotor will stay on firmly. Then to take them off you just put a bolt in the hole and turn it. It broke when I tried to take the old ones off, but they were probably like 10 year old rotors. So im just wondering why there is a screw there in the first place.