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I built mine. about 1400 dollars maybe. 44lbs. 14ahr litium battery. 750watt motor. It'll go 20 miles motor only. max motor-only speed 22 mph. 36 volt system. mine is a roadbike with MTB front forks (for the motor). A bike with close to this combination of range and speed and weight that my neighbor bought was 2500 bucks. But he has lots of proprietary stuff and he complains about the 42 tooth top gear. The aluminum road bike frame I used has a 52 tooth top gear. His bike is prettier, but I think my capacities are stronger. The only bikes I have seen that are actually lighter than mine and have my range and power or better start at $7,000.
I hope that's helpful. I did a thread on the build here at EM too.
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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