How to turn an average bike into an electric assisted one. Step one.
Step 1: Get a second back wheel - geared axle.
To start this project you need to get a second back wheel. This backwheel that has a gear on it will become your new front wheel.
The image here of a geared back wheel does not have a freewheel. The freewheel is the part with five or six gears on it that can only apply force in one direction.