The link is Bull shit because the craks apier wier your rear disc is fited to your flange so the cracks are caused from bracking using your rear bracke witch is what its thier for !!! not over tightning of your rear wheel bmw are now using flanges made from steel instead of alloy mine was changed 2 years ago with plenty of cracks in it ! and will be changed again on friday all thou the one on it is ok as I havent done any millage since last changed I still have the orinal rear bracke pads in so you need a new flange before you need bracke pads !!! the new material one is 500 grams heavyer