I've been avoiding buying a cycling computer mainly because I don't like to have a lot of stuff on my bicycle. I know that's silly, but I like the clean lines of an uncluttered bike.
I like the idea of a wireless computer that goes on your wrist, like a watch, but those seem to start at $200.
Has anyone tried putting an under $30 wireless computer on a wristband? Think it would work?
Also, do the GPS units calculate speed from the global positioning, or do they require a spoke-mounted magnet and sensor?