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      11-15-2012, 02:36 PM   #4
ben@tirerack
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Drives: 740i
Join Date: Mar 2008
Location: South Bend, IN

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This is not completely shocking when you factor in that BMW speedo is usually reading a few percent high. Stack the ~3% error on the speedo with 3.5% error due to tire size variation and maybe a couple percent error in the GPS and you're right there.
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I have accepted a new position at Tire Rack and am no longer in the sales department. gary@tirerack.com is available to assist with M3 questions.