I have a wired Sigma Sport BC 800 computer that is all over the place in its speed and distance readings.
It records incorrect distances and jumps around with speed ... one minute it will show 22 kph and then 42 kph..... and I don't accelerate that fast !!!
I have replaced the battery , realigned the sensor and spoke magnet numerous times and following some advice from my lbs, I recently cleaned the connecting sensors (don't know if thats what you call 'em ) under the computer itself and where it connects to the handle bar unit.
All to no avail - any advice greatly appreciated or is it just a signal to upgrade
