In Europe, there are three different classes of electric bicycles, each with its own speed limit:

Class 1 electric bicycles: These are pedal-assist bicycles that provide support only when the rider pedals. The motor cuts out once the rider reaches a speed of 25 km/h.

Class 2 electric bicycles: These are throttle-assist bicycles that provide power without the need to pedal. The motor cuts out once the rider reaches a speed of 25 km/h.

Class 3 electric bicycles: These are pedal-assist bicycles that provide support only when the rider pedals. The motor cuts out once the rider reaches a speed of 45 km/h. Class 3 electric bicycles must have a speedometer so the rider can monitor their speed.

It is important to note that these are the standards for Europe, and different regions may have different rules regarding the speed limits of electric bicycles. It is recommended to check the laws and regulations in your area before riding an electric bicycle.