speedo accuracy

[steiner_ca@hotmail.com (Craig Steiner)]

>BUT when I pass one of those portable police radar "Your Speed Is..."
>trailers, the speed indicated by the radar is nearly 10% higher than my
>speedo and tach/theoretical speed chart would indicate.
>
>I have to assume my calculations AND my speedo are off, or the radar
>trailer is off...WTH?

I pass one of those every day and the speed indicated is always 3 mph less 
than what my speedo indicates.  I've got GTi 14" wheels with 195/60's.  
Also, my last speeding ticket said 62 in a 35 mph zone.  When I passed the 
cop, my speedo indicated about 67.  Nearly lost my license that night, 
almost 11 years ago.

Craig Steiner
LTjg USNR
'88 Alpine White 16v

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