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fwiw, in the SCCA nationals AX, most people squeeze the widest, stickest tire they can legally and physically put in the wheel well...why? I can only imagine they are trying to get more contact patch....also, in the last Grassroots motorsports, they tested several AX tires all on 8x18" wheels (might have been 17s, but can't remember, but was 8" wide for sure) ...these
AX tires were mostly 275s, with one exception of Kumo, which buckled and they had to move down to 245s...interestingly enough, the 245 Kuhmos tested the fastest. Now most people outside of serious AX would never attempt to put a 275 on an 8" wheel. But serious AX'ers evidently do...
Also in this months Excellence magazine, there is a dedicated 914 AX car highlighted...noticed it had 7x8x15 fuchs, but has Goodyear 9" wide x 23" dia slicks on front and back.
Track tires are another story altogether I'm sure, but is wider tires better in AX? I'm sure there is a limit, but seems like the serious AX guys think so.
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85 Carrera
2011 Cayenne Turbo
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