Electric bikes (e-bikes) typically have top speeds regulated by their class and local laws:

• Class 1 and Class 2 e-bikes provide electric assistance up to 20 mph (32 km/h). Class 1 bikes are pedal-assist only, while Class 2 bikes also have a throttle but both cut off assistance at 20 mph

• Class 3 e-bikes offer pedal-assist up to 28 mph (45 km/h) but do not have a throttle. These are the fastest commonly allowed e-bikes without special licensing

• In many countries like the Netherlands, the maximum allowed speed for e-bikes is about 25 km/h (15.5 mph), with speed pedelecs (a faster category) allowed up to 45 km/h (28 mph) but requiring additional licensing and safety gear

Some high-performance or modified e-bikes can exceed these speeds, reaching 40-60 mph or more, but these are not street-legal in most areas and require special permits or licenses

. In summary, most legal e-bikes assist up to 20-28 mph, with the rider's pedaling effort able to push the bike faster, especially downhill

. This makes e-bikes significantly faster and less physically demanding than traditional bicycles, which average around 10-15 mph on flat terrain