Garmin Rally Rs100 Pedal Upgrade Upgrade your Garmin Rally RS100 to a dual-sensing power meter and analyze more than just a watt to see exactly how your pedaling style generates the force that moves you. When paired with the Rally RS100, the upgrade pedal complements the Rally power metering system, providing left / right balance data and cycling dynamics. The power sensor is even transferable to Rally XC pedals so you can have power for your off-road rides. The revolutionary cycling dynamics show where you are generating power throughout the pedal stroke and show left / right balance. See where you apply force on the pedal to ensure correct cleat position and follow sitting versus standing position to see how the position changes efficiency.