Race star rim pilot is 78.1, Hellcat is 71.5, allot of rims come with plastic concentricity bushings, the pilot on the spacer incorporates the pilot bushing into it. Yes, wasn’t too happy having to use a spacer but it’s the sidewall bulge of the 315/50-17 tire that’s the issue, a 305 wouldn’t need it. I need all the tire I can get and These are just track day combo so they’ll suffice.