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Old 11-19-2009, 11:02 AM
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Finfan Finfan is offline
Motorized Bicycle Elite Member
Join Date: Aug 2008
Location: Tucson, AZ USA
Posts: 871
Default Re: Mechanical speedometer

I've always doubted the accuracy of those things. I compared the rpm scale to the mph scale once and figured out that they would both be accurate for a 32" wheel. I suspect they are made for kids who want to think they are going real fast.
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