Originally Posted by donphantasmo
Don't know if you've tried this, but
Old Skool Mechanical Speedo
Lemme know if that would work. I'm actually looking at this for myself..
Yeah, if those work I could use a couple myself, if the RPM/strain of the motorized bicycle doesn't hurt them. From the pic it reads to 60KPH, I don't exceed that (often), so it might work out.