I have started on a new project and decided to use electric bike motors. I though some of you would be interested to know what's inside. These motors have good power and torque so no gearbox is required and with all those small windings inside they allow fairly precise control of speed and direction without any mechanical play.
As I want these motors for a robotic project I did not buy the speed controller normally used as it would not suit my needs. Electric bike controllers do not normally have reverse. Now I am building my own.