[MDORPHN]

I'm under the impression that there is no universal "standard" for tire wear ratings recognized by tire manufacturers and that the ratings are used primarily for marketing purposes. For this reason, I believe that they are only useful to compare the wear for a given manufacturer's line of tires.

Right or wrong?

EDIT: Found this on TireRack's website "The problem with UTQG Treadwear Grades is that they are open to some interpretation on the part of the tire manufacturer because they are assigned after the tire has only experienced a little treadwear as it runs the 7,200 miles. This means that the tire manufacturers need to extrapolate their raw wear data when they are assigning Treadwear Grades, and that their grades can to some extent reflect how conservative or optimistic their marketing department is. Typically, comparing the Treadwear Grades of tire lines within a single brand is somewhat helpful, while attempting to compare the grades between different brands is not as helpful."

Neil