Lakebod wrote:I have a a magnet disk wherein only one side of the disk exposes the magnets, so if installed on one side of the bike Id have to flip it, and there would be plastic between the magnets and the sensor. Does it matter which side of bike I install?
Is there a rotation arrow on the disk that told you you would have to use it with plastic facing the sensor? Mine has that arrow, and the disk has to spin in that direction no matter which side is used. I had mine on the non-drive on my first build. When I followed the arrow, it worked. I reassembled disk backwards when I greased the BB later. Then the PAS only worked if I spun the crank backwards.
I would guess that your disk would still work if you had to mount it so the sensor faces the plastic side. The magnetic field will go thru plastic, but the distance is greater, which weakens the field, so it could fail. If magnets facing the sensor is the required alignment, assemble the PAS that way.
That round clamp didn't fit any of the BB's on the two bikes I have tried anyway. I always had to clamp the sensor to the frame with a home made bracket.