I have 5 BBS wheels on my e46 and couldn't figure out what was causing the vibration at high speeds (around 50-70 mph). I had balanced my wheels the first day I mounted them along with the camber, but I still had the same problem at higher speeds. After some research I found that my wheels were not hub centered. This product has completely eliminated vibration. However, installation was a little awkward as they didn't run flush on the hub. I thought they sent the wrong size even though it says my hub size but you just need to clean the dirt/brake dust on the hub before installing it as it fits very snugly. They bend very easily, be careful.