More power, more torque and more support. When you want it, or all the time. Determine the performance values of your drive unit yourself via the custom riding modes in the eBike Flow app.* You can adjust the performance values for the following drive units of the smart system: Cargo Line (BDU384Y) Performance Line PX (BDU347Y) Performance Line Speed (BDU388Y) Performance Line CX (BDU374Y) Performance Line CX (BDU384Y) *Maximum values: deviations possible, depending on the hub gear system and ba