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Old 12-20-2013, 06:54 PM   #2
Joe B
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Join Date: Dec 2012
Location: Jackson Hole, Wyoming
Posts: 800
Look in the owner's manual (RTFM...I always wanted to say that ). Start at 29 F/36R, that's what Porsche recommends for OEM tires/wheels (I run 30F/34R).
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