How can I figure out how fast my electric bike would go?

best electric bike hub image

morbeckbra

I'm trying to put together an electric bike, with parts from http://www.electricscooterparts.com/. I'm using a standard bike frame that weighs about 30 pounds. How can I calculate how fast a hypothetical electric powered bike will go just from looking at the voltages and amperages of the batteries/motors listed on the website?

Answer
wrong data. you need motor rpm and drive train ratios. voltage and amperage gives you power, watts or horsepower. which will let you figure how long it will take to get to top speed.

example: a hub motor with no gears, running at 250 rpm will move a 26 inch bike wheel at about 20 mph.

how do i get electric bike to spin the chain?

csmuch41

i wanted to make an electric bike but i dont know how to make the chain spin... how does it work?

does electricity and battery make it spin or what how does this all work?

Answer
You are right. An electric motor and battery are what is needed.

But most electric motors are either direct drive in the rear hub OR there is a roller that drives the front wheel directly. With your level of expertise I'd recommend getting a kit. Australia do some good ones.

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