Garmin Edge and Zwift data difference

[Mike_Rowe1 (Mike)]

Hello @Yuri_Kaganovich, here is the explanation:

How Does Zwift Determine My Speed?

How Does Zwift Determine My Speed? For Wheel-on Classic Trainers: Zwift takes the wheel speed broadcast by your speed sensor and the power curve (see example below) of the trainer you select on the Pairing Screen and converts that to virtual watts, also known as “zPower”. Your in-game speed is de…