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Original post by: Dhansen01 ,

Text:

I've heard that as a tire wears down, it gets better MPG's.  Which makes sense, especially for lug treads, because the lugs are soft and compress under load, therefore the tire gets harder as it wears down (less rolling resistance) but with less traction in bad conditions.  Presuming that's true, need to take that into consideration when deciding to replace them.  The rolling resistance might be less than the specs when new.

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