Re: 67 camaro front wheel backspace ?
I run 18x7 with 4.25 BS. I also have 225/45 tires. The top outside of tire is pretty close to the fender lip. In theory, with your wider tire (235) and less back spacing (4.0), your tire will be even closer to fender lip and may cause some rubbing issues. How much closer? 235-225=10mm or 5mm (.20") on each side plus .25" due to less back space (4.25-4.0) so you are looking at 0.45" which could make a difference.
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