Originally Posted by Wease

I hope you get a good answer myself. I bought the Exotek XB4 12MM hex as well in hopes of using my B5M wheels. The hex on the XRay Aerodisk wheels are damn near flush to the outside of the wheel, while the B5M hex is centered inside the width of the wheel. When I measured the width with the B5M wheels, the front was 9.5mm wider than stock and the rear was 4.5mm wider than stock. At this point it doesn't pay for me to use them since I can't use my existing 12mm wheels/tires.