[fatalhamocyde]

I just noticed a lot of vibrations when reaching freeway speeds (>50MPH) since I installed 17mm Ichiba V2 spacers. Is this common when installing wheel spacers? Is there a fix?

 

[JasonH]

Did you clean the surface to make sure the spacers are mating flat? Are the spacers hubcentric? Are your wheels hubcentric?

 

[fatalhamocyde]

Yes to all your questions but I found the fix on a G35 forum.
DIY: Wheel spacer vibration fix - G35Driver