Hi - did you ever get this sorted? I’ve just got a hrm tri to pair with my Fenix 5 plus and it won’t display run dynamics even though I’ve added the data screens to my run settings.
Have you checked the battery in your HRM-Tri ?
Hi, yes I changed the battery and still nothing.
I called Garmin Support and they were really helpful, I've got to return the hrm-tri and I think they'll replace it.
Great!