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Rear tire size affects mpg reading on MF display?

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Old 10-31-2012, 03:39 PM
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e63 p30 estate
Rear tire size affects mpg reading on MF display?
Currently (and temporarily) running 285/35/18 rears, and it seems my mpg is reading lower than normal (by almost 10% based on a very reliable commute). I thought the speedo was based on the front wheel, not the rear? Or is it my imagination?
Last edited by TonyC; 10-31-2012 at 04:53 PM.
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Old 10-31-2012, 03:42 PM
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Do a huge smoky burnout and watch the speedo....

If the needle doesn't move, it's referenced to the front wheels....

Sorry, I don't have a smarter way to diagnose it.



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Old 10-31-2012, 03:48 PM
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(SOLD) 05 E55 Estate. 11 Golf TDi
WOW! 0 sidewall, got pics?
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Old 10-31-2012, 03:49 PM
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2012 C63 BS & 2014 E63 Estate & 2008 CLK63 BS
Originally Posted by theunderlord
WOW! 0 sidewall, got pics?
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Old 10-31-2012, 04:53 PM
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e63 p30 estate
Originally Posted by theunderlord
WOW! 0 sidewall, got pics?
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