Looks like the Tread uses the MURS radio frequency for group ride. I hear it will not work in Canada. MURS is just like FRS and GMRS, so not alot of range in mountains. We use these frequencies (MURS 1, 2, and 3) for ATV riding, and range is the same as FRS & GMRS. Only benefit is that there is hardly ever anyone on these frequencies.
Polaris uses RC-7W ( i think this 2402 to 2480 MHz , which is 2.4 GHz ) for their group ride. This might have more range than the MURS . . . ?
These are 2 completely different frequencies, so the Polaris 7S will not work with the Garmin Tread.
Would be nice if they all "talked" to each other.
If someone has more "frequency intel" - please feel free to chime in.