Tread Wear

Treadwear grades typically range from 60 to over 500. Treadwear ratings are determined on a 400-mile government test course covering specified sections of public roads. It's important to remember that the actual life of any tire is determined by the road surface quality, driving habits, inflation, wheel alignment and the rotation it experiences. There is no direct translation of mileage on a tire from a treadwear rating number. Just remember the best way to use treadwear ratings when selling tires is to compare one rating to another. For instance, a tire with a treadwear grade of 400 might be expected to last twice as long as a tire that has a grade of 200.