Re: Speedo no not the swim suit
I'm willing to bet this speedo says "SPORTS" on it, and has crossed checkered flags on it? I think that's the only mechanical speedo anyone is selling anywhere.
They sell different ones for different size wheels. The one I have is for 26-27". So, obviously not perfectly accurate, especially considering the needle tends to jump around a lot. But between that, and listening to my RPMs, and testing against a police radar trailer, I know where 20MPH is, and nothing else much matters to me.