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...use the California RR-value numbers! California passed a law that all new cars sold in their state must use low-RR tires, so they must have a "scoring" of "listing" of what brands and model tires are acceptable.
...of course, you'd better send along a self-addressed and stamped envelope to guarantee any possibility of getting an "...answer..." since I'm sure their 'Postal $tamps Budget' ain't what it used to be (ha,ha).
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