Originally Posted by
cyccommute
Same problem as above. Even a powerful magnet like a drive magnet is still too weak to have any effect. Position your wheel directly over the sensor wires and, if you have a choice over the middle wires of the figure 8 type sensor.
You could put a couple of the magnets on opposite sides of a wheel. I bet that would work.

It gets the magnet right down there near the street level. It would simulate a significantly larger hunk of metal. I have a small (20") front tire on my recumbent, so I could easily roll a little forward or backward to make this work. I'll have to try it.