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      06-01-2010, 03:50 PM   #3
Biimmer
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Drives: 11' e90 m3
Join Date: Jun 2010
Location: Phoenix, AZ

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Still confused.. I have always thought that the "30" in a 275/30/19 tire would refer to the thickness of the sidewall. How does the width have any effect on the diameter/aspect ratio?

Thanks for the help I'm trying to learn