Where are you measuring that length from? I have the OEM studs in front of me and they are 47mm if measured end to end off the car. The .565/14mm knurl is fine for us yes.
Also, in your description above I believe you meant OEM on the left, Z1 on the right.
Edit: Also, I'm getting a 4mm difference front to rear on the studs, but I'm using a tape measure so I'm sure it's not exact. Any particular reason you are looking for such an exact length?
Last edited by edconline; 03-23-2014 at 04:51 PM.
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