Garmin has moved to address this with a free software update for the watches, where the main change is focused on improving battery life. Software version 6.17 is available now on both watches ...

You want all Garmin's top-spec features: The Forerunner 970 covers all the tri bases. You want low weight: The Forerunner watches are lighter than the Fenix series.

As much as I love Garmin products, the Forerunner 970 has a range of features for running and swimming that I don't need and might not make sense for someone looking to find the best cycling watch.