Join Date: Nov 2009
Location: El Paso, TX
Bikes: Co-Motion Speedster Co-Pilot
As others adopt the new Gates Center Track belt drive I am sure some will run into the issue of the Garmin cadence magnet interfering with belt. The center track belt is positioned in a more outboard position then the older CDC belt drive system. I have found a nice solution to this problem. I apologize for the poor photo quality. The batteries for the camera were dead, so I took these with my phone.
I ordered 1/2" X 1/4" X 1/8" rare earth magnets. I had to order 10 but they were less than $10 for the bunch.
Here is the image of a single magnet...
The magnet was then placed on the inside of the stokers left crank on the end of the pedal spindle...
As you can see here, there is good clearance between the belt and the magnet...
It is recommended to go with the ring-shaped magnet vs. a disc-shaped magnet. These babies are really strong and the ring allows you to use a small screwdriver to remove it from the spindle. The disc could lead to damage of the cranks while trying to get a tool behind the magnet for removal.
The magnet is strong enough that the Garmin cadence sensor picks it up easily even though there is considerably more clearance than with the original magnet.
I hope this is helpful for others who may run into this same problem in the future.