Topic: Aftermarket speedometers

[eigenvector]

Chalk this up as ignorance on my part - but when getting an aftermarket speedometer I notice that none that I can find offer a traditional speedometer cable hookup.  They're all magnetic pickup style.

Definitely not my preference - but can they not offer speedometer cable style gauges simply because they would have to know the gear ratios, or are they being lazy and magnetic pickup is simpler?

[colvinry]

This comes down to economics and what is cheaper to produce in a manufacturing environment.


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[BobbyR]

It would make more sense for them to use a magnetic pickup. That way it is truly universal, you would only set the wheel diameter and be done with it. 

[eigenvector]

Thanks for the replies.

I'm not knocking magnetic pickup style speedometers - I was trying educate myself on what I was looking at.

What about cable driven speedometers - so long as I keep wheel size constant are they interchangeable between bikes?