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I don't know why, but I've never had tires wear out in the center--when inflated at or slightly above factory settings, they always wore out on the sides. The current tires on the Clunker are still wearing out on the shoulders first--even though they've been at sidewall max for 15,000 miles. Even when I lived on the flat, I still had metal showing at the shoulders and tread in the centers.
While we're talking about invalid hypermiling techniques, I'm going to harp on "circling the parking lot to bleed off momentum." There is nothing to be gained from it except artificially inflating your numbers, and you risk running out of momentum before getting to your spot, necessitating an "expensive" restart.
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