III User Manual Pedelec with centre motor 175 Assistance by the electric motorIf your Pedelec is equipped with hub gears, you mayhave to take more load off the pedals when changinggears than you would normally do when riding yourconventional bike. This is due to the additional poweroutput of the electric motor. The hub gear systemcontains a device that protects it against gear shiftingoperations under excessive loads in order to preservethe gear unit in the hub.5.1 Operating principle of assistanceThe motor provides support as soon as you switch the as-sistance on and start pedalling.The thrust delivered by the motor depends on three factors:• Your own pedalling effortThe motor adapts to the force you apply. If youpedal harder, e.g. uphill or when setting off, thepower sensor detects this and increases the thrustaccordingly. However, the thrust is limited by themaximum motor output.Variation in electric assistancePropulsive powerSpeedincreasing pedalpower andassistancereducingassistanceassistanceswitched offPower-assist mode = 1 : 2Pedal force22 km / h 25 km / hPropulsive power (pedal force +electric assistance)Electric assistance1.02Pedelec 28" • 8-speed • Shimano• The assist level you have selectedWith the "high assist level / HIGH" the power deliv-ered by the motor is double your own effort (1 : 2).With the "medium assist level / MID", the powerdelivered by the motor matches your own effort(1 : 1). With the "low assist level / LOW / ECO", thepower delivered by the motor is half your own ef-fort (1 : 0.5).• The speed at which you are currently travellingWhen you set off on your Pedelec, the assistanceincreases as you build up speed until your bikereaches its maximum speed of roughly 22 km / h.The assistance then reduces automatically untilyou reach a speed of roughly 25 km / h when itswitches off. This applies for the largest gear only.In all other gears, the motor switches off earlier,depending on the gear ratio.