Some people just use a GPS for their new and accurate Speedometer.
Jim Carter used to provide ratio adapters - he might still do that.
The Speedometer Shop is where I have obtained ratio adapters - they seem to be out of business.
Bob's Speedometer Shop supposedly makes them ($!50).
A Google search of
"speedometer ratio adapter" gives these results.
Maybe someone who has obtained one in the last year will post information?
