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marc hildebrant · 09-02-2010, 09:53 AM

I too used a GPS to check my speed. I found that the speedometer was SLOW by 5 mph.

The car has 19 inch tires (1931) and I wonder why it's wrong ?

Marc

09-02-2010, 09:53 AM	#5
marc hildebrant Senior Member Join Date: May 2010 Location: Cape Cod Posts: 1,128	Re: Speedometer test I too used a GPS to check my speed. I found that the speedometer was SLOW by 5 mph. The car has 19 inch tires (1931) and I wonder why it's wrong ? Marc