Quote:
Originally Posted by The HACK
I wouldn't do 275 wide on 8.5" rims.
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The minimum suggested rim width for 275/35 x 18 Hankook RS3's is 9" so it's only 1/2" pinch putting them on the 8.5" rim. You don't quite get the full benefit of the 275 tire width because there's a bit more radius at the shoulder than there'd be on a wider rim, but it's certainly a significant improvement over the stock 255/35 x 18" size.
I'd happily run wider rims, but the SCCA doesn't see eye to eye with that for Street class. You can change wheel diameter +/- 1" but you can't change wheel width.