Okay, Spanky, the application is
a folding bike with 16" wheels.
I tried a basic wired bike computer. The wire didn't begin to be long enough to go from the sensor to the head unit, much less allow for folding.
I got a Xoss G. Well liked until it quit finding GPS satellites after ~7 months.
Wireless? There's an LED headlamp 5cm away, and because of the geometry of the handlebar and the requirements of the fold, it's not going anywhere else.
Oh, and this is
on my wife's bike.
Recommendations? Suggestions?