Quote:
Originally Posted by happos2
Basically for these sticky new tires, tread wear isn't a very good rating. With the SCCA doing the 200 treadwear street tire limit, most tire companies who made the 160-180 treadwear tires will just say they are 200 tread wear...
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Exactly. Treadwear numbers are some of the least reliable numbers in the industry. Because consumers expect that low treadwear = high grip, manufacturers seem to set them artificially low for performance tires. Then if the rules change, they just raise the numbers and say that they 'discovered' that the wear was better than they had estimated.
Assuming grip level from treadwear number is somewhat like assuming horsepower from fuel economy numbers. One car gets 18mpg, the other gets 20mpg. Which has more horsepower?