Re: Why I don't trust mechanical speedometers.
The rpm would have to be for the wheel since that is the only thing it can measure. If you can't trust one scale you can't trust the other. It definitely is not a "one size fits all" device since there is no way to calibrate it to the bike. I stand by my conclusion, it's just a kids toy!
Humor me, I'm currently unemployed, stuck at home, and bored silly!
If it can't be broken I'll find a way!
I'm not lost, I'm exploring!