How to build your own DIY fast electric biccyle that can reach 40 mph

Electric bicycles is a booming industry. It seems like every week we hear about another new model entering the market. Outside of a few exceptions <>, most electric bicycles fall in the 15-28 mph (25-45 km/h) range. That’s fine for pleasure riding, but it leaves many enthusiasts looking for more speed.
With so many people commuting on electric bicycles <>, the extra speed of a fast electric bicycle is a nice addition for many, allowing them keep up with traffic. However, there aren’t many commercially available options for fast electric bicycles …
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