This will be a backwards post, I will show you the end result fisrt, and the build story later.
Yuba Mundo Cargo bike.
Crystalyte 72v 40a controller
Batteries 72v 15ah 30amp cont, 40 peak
Top speed 56km/h
We have had two adults and 2 kids on board and gone up hills you would struggle to ride a conventional bike by your self.
Goes great on the flat, easily keep up with the traffic around town.
There are 2 bikes here, the one with the disk on the front is our bike, the tidy looking one I built and sold to a family.