Specification of Electric Motor for Electric Bikes

Without telling us how much the vehicle will weigh and other specifications , you will only get wild ( and unhelpful ) guesses here.

Try doing a little more work in design to establish some more parameters with which to work. Then post again .

You match the batteries to the motor, then amp hours tells you how long it will last....So if you have a 1000 watt motor@ 48 volts then it would be watts divided by volts gives you the amps required....ie; 1000w/48v=20.83A So you would need 21A per hour....so with this scenario your batteries would last about an hour....with 4 ea 26AH wired in series for 48v....

http://www.falconev.com/E-Bikes.html

Provided the motor is strong enough to move the vehicle at all, at the required weight, speed, gearing, Drive train resistance and so forth, but yes basically Bat watts / motor watts.

This company Ultramotor makes these electric bikes, so there should be a way to equate the specs given to what would be required....

http://www.amazon.com/A2B-Lithium-Electric-Ultra-Motor/dp/B0021IQP8A

hi - what is the type of motor which you are using?