Go from one-sided to dual-sided power measurement with Garmin's Vector 2S Upgrade Pedal. With your standard 2S system (sold separately) you only have power data from your left leg, which leaves the possibility of unknown discrepancies between your left and right sides. Injuries, natural imbalances, and other factors that leave one side of your body less powerful than the other are common. By measuring power from both legs, you get a much more accurate picture of what you're doing and how to improve on any asymmetry you might have.
Total power (watts)
Left/right power balance (when combined with your Vector 2S)
Average power at various time intervals
Intensity Factor (IF)
Normalized Power (NP)
Training Stress Score (TSS)
fenix 2 Special Edition
The standard pedal pods fit crank arms 12–15 mm thick and 44mm wide. The large pedal pods fit crank arms 15–18 mm thick and up to 44mm wide.