Originally posted by AwwsChwA
ok, but wouldn't that vary between tire brands? I mean...Toyo and Kumho may both have a "200 tread wear rating", but they could be entirely different simply due to the rubber composition, tread shape, etc...
Well, it's probably not the most accurate way to judge the grip of a tire. The SCCA just uses it to differentiate between street tires and racing tires.