[JCz04Bimmer]

I ran a 5mm and 10mm spacer many times on my 330Ci at the track and never had an issue. But I have heard the same thing. Basically, you just need to be sure you install them correctly. People think you can just slap 'em on but you need to clean the hubs BIG TIME. I also run a stud/nut setup which makes getting them on and off super easy if there is an issue...