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Re: Isn't that the expected tread life of the tire.
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Posted by TML [Email] (#2212) [Profile/Gallery] (more from TML) on Thu, 9 Feb 2012 11:51:20 Share Post by Email
In Reply to: Isn't that the expected tread life of the tire., KB88900T, Thu, 9 Feb 2012 11:39:48
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If I understand you correctly, what you've done is take the ratio of the two treadwear ratings, and extrapolate from the treadwear you experienced with one to get the expected life of the other. This extract from the tirerack tech section explains why this is problematic:

"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."



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