Garmin's Forerunner line contains some of my favorite watches—the 265, which is arguably still the best of the bunch; the 570, which newly replaced it and has some snazzy new features, and the 955, which is a heck of a deal for something so feature-rich despite its age. If these numbers mean nothing to you, read on—they're actually pretty easy to understand once you know the two rules Garmin uses to pick what number goes with which watch.

The last two numbers describe its generation

Both of the watches released this year end in -70. The watches that came out in 2023-2024 all end in -65. They were preceded by a generation that ended in -55, and before that was -45, and so on. Could Garmin have just made the last two numbers reference a year, like 23 or 24? Sure, but at least there seems t

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