I recently bought a new Garmin 255 (couldn't wait for the new 265!).
I only recently started trying out the built-in optical HRM on runs (haven't tried it on bikes yet). I typically use a Scosche wrist HRM for running, as my prior Garmin 945 built-in optical HR got really terrible once I started moving, even if I cinched it down really tightly.
So far, the Garmin 255 seems like its giving my Scosche a run for its money on HR data for running! I have to use it long-term before ditching the Scosche, but for sure, this 255's HRM is a ton better than the 945 was and my early data so far looks like it's matching my Scosche. And I'm wearing the Garmin 255 on my wrist, whereas the Scosche is on my forearm (I have to put at arm sleeve over it to keep it from sliding around.)
I looked on DCRainmaker, apparently Garmin did upgrade the optical sensors for the 255 and their pricier prior models, but the 945 didn't have the upgraded sensor.
Just a heads up if anyone has a new one - give the built-in HRM a try, if it's good, chime in.
I only recently started trying out the built-in optical HRM on runs (haven't tried it on bikes yet). I typically use a Scosche wrist HRM for running, as my prior Garmin 945 built-in optical HR got really terrible once I started moving, even if I cinched it down really tightly.
So far, the Garmin 255 seems like its giving my Scosche a run for its money on HR data for running! I have to use it long-term before ditching the Scosche, but for sure, this 255's HRM is a ton better than the 945 was and my early data so far looks like it's matching my Scosche. And I'm wearing the Garmin 255 on my wrist, whereas the Scosche is on my forearm (I have to put at arm sleeve over it to keep it from sliding around.)
I looked on DCRainmaker, apparently Garmin did upgrade the optical sensors for the 255 and their pricier prior models, but the 945 didn't have the upgraded sensor.
Just a heads up if anyone has a new one - give the built-in HRM a try, if it's good, chime in.