My neighbor got a 1995 740il a couple of monts ago. He said going over speed bumps puts his factory chrome rims out of balance. He then gets a vibration and goes and gets the wheels balanced. The tire store told him that he needs to come to a complete stop when going over speed bumps. This does not sound correct to me. I fly over speed bumps with my Z 3 and have had no problems what so ever. What could the problem be? thanks Ryno