any modification has it good and bad points, and most that are modding on here know that already. Unless someone is hanging their wheels outside of the wheel well, I doubt any harm will come to our wheel bearings. Most aftermarket wheels are lighter, and offset usually less than 30mm is marginal. You are correct in your findings, but I believe the german engineers have done their homework here. Those racing, track racing, have more to worry about, than those of us going straight. But we are putting more load on those bearings than the everyday driver, so they should always be inspected more frequently than the manual recommends.