According to my sources, electric bikes’ speed can vary depending on the type of e-bike. Class 1 electric bikes have a top speed assistance of 20 mph (source: [Better Triathlete](https://bettertriathlete.com/ebikes/how-fast-electric-bike-speed-go/)), while Class 3 e-bikes are limited to 28 mph (source: [Cyclingnews](https://www.cyclingnews.com/features/how-fast-is-an-electric-bike/)). The average speed for electric bikes is 20 mph (source: [Electric Ride Lab](https://www.electricridelab.com/how-fast-do-electric-bikes-go/)). However, some e-bikes can reach speeds over 50 mph, but that would be illegal for road use in many countries (source: [Discerning Cyclist](https://discerningcyclist.com/how-fast-are-electric-bikes/)).
There are many varying factors that directly affect how fast an electric bike can go.
You can go as fast as how fast you pedal. You can go as fast as how you can control the throttle of the electric bike should.
There are also different bike laws for different countries and states of what should be the top speed of each electric bike that should be allowed on the streets.
For class 1 and 2 electric bikes, mostly have an a top speed of 20 miles per hour. Class 3 electric bikes have a higher top speed of 28 miles per hour.
