i had a flat today on the way home. when i went to change the wheel, the locking nut had been done up so tightly, i couldn't get it off. i had to call up the AA and they had to drill out the bolt. nightmare and has damaged my alloys slightly. Had my rear disks replaced only 3 days ago at kwickfit and when re fitting the wheel, they must of overtightned them. just a word of warning, its best to find out if your bolts are too tight before you are trying to change them at the side of the dual carriage way!