I have a Speed/Cadence 2 bundle combo set and a Speed 2 Cadence2 sensor (non-bundle?) for another bike. Only the speed sensors show up on GC, not the cadence sensors. Same thing with my HRM-Pro and HRM-Dual. Only the HRM-Pro shows up in GC. My only guess is that the devices that show up on GC are capable of data storage that can be retrieved later via the GC app on a phone.
