The gear ratio means your legs go round a thousand times to move a centimetre. Totally pointless. If you run out of power you could actually cycle the bike home. So when would you actually use these?
It is true propelling the Sur-Ron and any speed with pedals is not an option with a standard setup, you would need to use a much smaller small sprocket on the rear (OEM kit uses a 25T) and even then it is not going to be a rideable option. The kit is designed for mountain bikers who prefer the feel of pedals the propulsion add on it for US laws which state that the pedals must be capable of propelling the bike (naturally no minimum speed is required ) For us Europeans the propulsion add-on has the added benifit if giving feedback on the pedals.