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For those looking for an easy-to-install, stealthy power meter with no fuss, Garmin’s single-sided Vector 3S Look Keo pedal-based power meter is a great choice. Though it doesn’t provide cycling dynamics like its dual-sided cousin (though upgrading the 3S to dual-sided is an option later on), this is still a lightweight setup that pairs with all compatible cycling computers quickly and consistently. Despite early issues with battery life, Garmin now says the user-serviceable watch-style batteries will last up to 120 hours of ride time. Also, expect ±1-percent accuracy on a device that can easily be swapped between bikes with a simple pedal wrench.
162g per pedal