I've done it last year. Have a good look at the specs, not all are able to handle speeds above ~99km/h (for cateye Enduro8 65miles/h). I used a few electronic components to pick up the tach-signal from the speedometer (see http://www.smallcar.com/speeds.htm ) The same signal I use for my cruise control.
It will give you 4 pulses per revolution, but you can correct that in the bicycle tach

Jaap
87 Caravelle

----- Original Message -----
From: John Rodgers <jh_rodgers@BELLSOUTH.NET>
Date:         Thu, 6 Nov 2003 14:10:14 -0600
To: vanagon@GERRY.VANAGON.COM
Subject:      Magnetic Tachs - bicycle to vanagon

> Some time back someone posted to the list a source for a bicyle tach and
> mileage meter that they were experimenting with, mounting it on the
> wheel or drum.
>
> Can anyone point me in the direction to find this, or to a/the seller of
> the bike tach/mileage meter?
>
> Thanks,
>
> Regards,
>
> John Rodgers
> 88 GL Driver
> Chelsea, AL

--
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