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      07-30-2011, 09:36 PM   #12
elm3
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Drives: 2009 e92 M3 Interlagos Blue
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[quote=Mace;10131128]As others have said it's measured at the transmission not at the wheels. When it comes to changes due to wheel diameters only the rear tire diameters matter because they're the drive wheels.[/QUOTE

+1 there is a speed sensor on the tranny.
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