Originally Posted by
Steve B.
Yes, that makes sense.
i can now recall seeing wonky speed readings while riding over a metal decked bridge, with the speed going all over the place, I'm aware that speed sensors are sensitive to nearby metal, a result of using the earths magnetic field to determine rotational speed.
There are a few locations where the rear mounted (front has a dynamo hub) speed sensor almost always goes wonky, which I assume is due to something ferrous under or in the road. The problems with dropped sensors previously noted is otherwise random.
Suppose I could break out another bike and see if the sensor issues continues, albeit with different sensors.