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      07-30-2011, 09:36 PM   #12
elm3
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Drives: 2009 e92 M3 Interlagos Blue
Join Date: Sep 2008
Location: Canton, GA.

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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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'09 E92 ///M3 Interlagos Blue, 6MT, Silver Novillo Leather, CF Trim, Premium Package, Technology Package, Cold Weather Package, Premium Sound, 19" Wheels, Moonroof-Toy/ '14 335i, Sport Line, Premium Package, Technology Package, 19" wheels, Heated Seats - Daily Driver/ '04 Yamaha R1 - Toy/ '06 Yamaha Raptor 350-Toy