QUOTE(Quazacolt @ Dec 10 2014, 02:41 PM)
assuming hankook isn't BS'ing on those rating, do consider the tire's performance limits.
tread-wear 500 is going to last you very long and long lasting tires typically don't do very good on grip/traction, be it dry or wet, particularly wet.
That is true, because it's made of harder compound, thus less grip compared to other brand. However, reviews on the internet for this particular rubber are mostly positive.
Treadwear rating for each rubber is graded by testing it under controlled conditions, so it is very unlikely (but not impossible) that they would overestimate its treadwear rating.
QUOTE(http://en.wikipedia.org/wiki/Treadwear_rating)
The wear on tires that are being tested ("candidate tires") is compared to the wear of Course Monitoring Tires (CMT), which are sold by the NHTSA at its UTQG test facility in San Angelo, Texas. Both types of tires are mounted on vehicles that will be driven in a convoy during the test, thus ensuring that the candidate tires and the CMT tires experience the same road conditions. The convoy, typically one of four or fewer vehicles, will drive 7200 miles on public roads in West Texas. Candidate tire wear will be checked during and after the test, and compared to the wear on the CMT tires from the same convoy.