05-16-2016, 04:55 PM
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Join Date: Nov 2004
Location: Sydney,
NSW
Cobra Make, Engine: Classic Revival #3199. 366ci L76, T56 6 speed, Blue circle custom paint, Australias most original cobra 2009-2010
Posts: 2,396
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Interesting Dave. I have also found a bit of stuff about how those numbers can be manipulated, but it also looks like there are a lot of amateur series in the US that state a minimum UTGQ requirement for the tyres:
2014/2015 Street Tires (...actually it's 200 treadwear!) - evolutionm.net
We could make it the "180 Class" - which could also mean we tend to spend a lot of time pointing backwards... 
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