I wanted to upgrade the wheels from the old style steel rims, to some more modern alu rims. I found some 16″ Mercedes rims close the where I live, so I bougth them. The ET was only 35, so I needed some 6mm spacers to make them fit my car. (ET29) I also wanted to get rid of the pesky wheel bolts, so i desided to convert the front to studs. Here is how I change from nuts to studs on my vanagon T3 T25.