The Subsystem Approach
The Subsystem Approach involves converting a bicycle that uses common bicycle hardware to an electric powered or power assisted vehicle. This approach to developing an eBike has an idea at its core - that common and inexpensive bicycle parts should be used for the underlying vehicle. The parts qualification is that it meet the need for the purpose, is commonly found at a bike store and is affordable for the scale of the project. The goal of the approach is interoperability of all the parts, keeping over-all costs low (which opens the door to experimentation) and a degree of performance in a certain defined range.