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20" summer to 18" winter tires screw up speedometer?
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09-18-2009, 03:12 PM
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jm251
Drives: 2010 CGM 2LT RS A6
Join Date: Jun 2009
Location: Philadelphia
Posts: 133
Well, the winter Pirelli's are definitely taller walls than the summer tires so maybe that makes up the difference. Ordered from Tirerack.com.
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