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      01-02-2013, 03:36 PM   #6
BavarianFanatic
Too much is never enough
United_States
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Drives: Too Many
Join Date: Mar 2008
Location: SE PA

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ANY tire will end up with flat spots after parking for an extended period of time. Especially when it's cold. It's not isolated to run flats. As you've discovered, driving them until they get up to temperature or parking somewhere warm corrects it.