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Old 09-22-2009, 03:41 PM   #19
jmatta
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Join Date: Nov 2007
Location: Chicago suburbs
Posts: 1,675
The speedo may be designed around 18" wheels.

Not; I have 18s and as I post earlier, my speedo is off at least 4 to 5 mph.
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2002 Boxster S
1973 911 Green FrankenMeanie
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