Most large hub motors that come out of China are based on the 9-Continents motor (or 9C). This is the most common direct drive hub motor on the market. Currently there are hundreds of Chinese factories churning out whats called “9C clones”. In China there is pretty much no respect for copyright law and once a design has proven itself to work well, it is replicated in bulk. The 9C clone is what the faster e-bike kits consist of, and is actually the same design that the new Crystalyte (read review) was based on. For a detailed explanation of what a 9C motor is made up, read our detailed story on the 9C motor.
9C hub motor clones come in all shapes and sizes. A customer who is making a large enough order can specify the diameter of the motor, the width of the magnets, the thickness of the copper wiring, and the thickness of the wires going into the motors. It’s amazing to see piles of hub motors which I know will bring many hours of joy to whoever owns one. It gets me juiced up and excited to think of all these delicious motors mounted to bicycles of all shapes and sizes all over the world.