My cyclocomputer (odometer) has recentlystarted to measure double the speed. I have no idea why it's happening, except I *think* it's happening when the temp goes over 12 or so degrees C. I tried disengaging it from the cradle, resetting it, and a number of combinations of the above.
Then, after a while, it would work OK again.
This erratic behaviour started now at the beginning of spring. I cycled most of the winter with this cycle comp.
I also tried adjusting the magnet on the spoke a few mm lower, or to the side, but it had absolutely no effect.
Any idea? The cyclecomp is branded "Union 10", if that's of any help.