Fast electric bikes have different speed limits depending on their classification and the country or state regulations. In the UK, the EU, and Australia, the motor assistance cuts out at 25kph (15mph) for most electric bikes (source: [BikeRadar](https://www.bikeradar.com/advice/buyers-guides/electric-bike-faqs/)). However, some electric bikes with more powerful motors can reach higher speeds, such as up to 45 km/h (28 mph) for class 3 e-bikes in the US (source: [HimiwayBike](https://himiwaybike.com/blogs/news/ebike-speed-limit-in-the-us)). It is important to note that the legality of such speeds varies by location and classification of the electric bike.
If you are in the US, your electric bike would have to go as fast as thirty- two miles per hour on public roads.
In Europe, fast electric bike restricts to twenty-eight miles per hour. It heavily varies on which country of location.
