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      08-14-2011, 05:51 PM   #17
piloto
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Drives: 2011 E90 M3 - AW/FR
Join Date: Jun 2010
Location: Orange County, CA

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Quote:
Originally Posted by Seattle S65B40 View Post
WAIT - How are you guys measuring this? Just wrapped a tape measure around mine at 12 o'clock and it was 11.5 cm - so 115mm.

That's the circumference. 2(pi)R=Circumference

2*3.14*R=115mm

2R=Diameter=36.62 mm

The difference is likely due to how accurate your and our measurements were, and some manufacturing tolerance.