In Europe, there are three different classes of e-bikes, each with its own speed limit:

Class 1 e-bikes: These are pedal-assist bicycles that provide assistance only when the rider is pedaling. The motor cuts off once the rider reaches a speed of 25 km/h.

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

Class 3 e-bikes: These are pedal-assist bicycles that provide assistance only when the rider is pedaling. The motor cuts off once the rider reaches a speed of 45 km/h. Class 3 e-bikes 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 varying regulations regarding e-bike speed limits. It is recommended to check the laws and regulations in your area before riding an e-bike.