New VDO Speedometer - 45MPH Rupp?

[capguncowboy]

I picked this up for my Rupp Roadster build but I sold it before I got it installed. I was told it works on a 10" bike. Comes with everything pictured

$50 shipped

 

[Not so mini bike]

Will it work on a 12" bike

 

[capguncowboy]

I was told it was for a 10" bike. I'll be entirely honest and say that I don't even understand how they work at all

 

[capguncowboy]

This is sold!