Posted by Dean on March 02, 2016 at 18:07:02 from (152.216.15.5):
In Reply to: OT: OEM tires posted by Logan in S.E. Texas on March 02, 2016 at 13:22:10:
This information is 20-25 years old but I expect that it is still accurate.
Tire manufacturers categorize production into grades.
The highest quality tires go to OEM manufacturers due to tight OEM specifications.
The next grade goes to manufacturer stores, e.g., Good Year, if any.
The next grade goes to non captive stores, e.g., independent tire stores, Wal Mart, etc.
The lower grades become seconds, blems, etc.
This is readily apparent by paying attention to the amount of weight needed to balance tires after installation. Tires installed on new vehicles usually have very little balancing weight, and are often balanced by mounting on the rim such that the imbalance of the valve stem results in acceptable balance. Tires sold by captive tire stores will usually need more weight but less than needed to balance tires sold by Wal Mart, etc. Blems, seconds, etc., will nearly always need considerable added weight to achieve acceptable balance.
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