Comment by jacquesm

45 kph flat out, if you try to go faster you are fighting the motor. But practically you're going to top out at about 40 kph on the Bosch system, using a Stromer or a Klever s-pedelec you will be able to maintain that 45 kph a lot longer. But 38 is plenty for me, it's still a bike and the little bit of extra speed does not weigh up against the risks.