Originally Posted by
cyber_hawke
...I have had an issue with setting up a decent bike computer with a cadence and speed sensor. The distance between the pedal and bike is too large for the little magnet that comes with the typical computer, but bought a bigger magnet from my local HW store and that fixed that. ...
I had this problem on my '02 Sirrus. I solved it by whittling a wooden shim that would set the sensor out a little further from the chain stay. I zip-tied the shim to the stay (with a bit of old inner tube between, to keep it from slipping), then zip-tied the sensor around both the stay and the shim. It worked fine.
I had to replace the wire later, and then I decided to do something less kludgy-looking. I zip-tied the magnet to one spoke of the chainring spider, and I mounted the sensor to the downtube. This worked fine, as well.