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      12-15-2012, 11:19 AM   #13
gimmethemuumuu
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Drives: 2011 E90N M3
Join Date: Apr 2009
Location: Indianapolis, IN

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Any other thoughts?

15mm might work up front. However, I would think 20mm, being closer to 3/4"+, would cause the front to poke out too far, especially when compared to the rears which are flush (for the aftermarket wheels).