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Originally Posted by Highrev1
I ran a 245's up front on a stock width wheel...THese where R compunds so really they were problaby a street tires equlivalnt of a 265. I got them on there and had no rubbing and the car did MUCH better than when I was running the 225s all around.
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Oh I'm sure the 245s handled better. My point when saying "the less optimal your tire wear will be" was that you get extra stress buildup with incorrect tire/rim width ratios. If the rim is a lot more narrow than the ideal spec, then it can cause stress that prematurely wears out the tires. Tires are designed to flex, but if the rim width is off then the tire flexes in weird areas that it wasn't designed to. In short 1-2 minute spurts of autocrossing this isn't much of an issue, but in the long run it will make an impact. I think that's why tracked Si's use at least 17x8 for 245 width tires.