So here's my thoughs. I measured the distance from my outer wheel wells to the sidewall of my tires using a plum bob, averaging each side to account for uneven ground. I'm getting 10mm in the rear and 25mm in the front.
Now this having been said, it might be more cost effective to get the cheaper 5mm rings from Z1 since I wouldn't need to extend the studs.
https://www.z1motorsports.com/brakes...mm-p-3118.html
...and bolt on 20mm for the front.
https://www.z1motorsports.com/z1-pro...mm-p-5392.html
That might work.
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