This is the Sachs-engined Mongoose comfort bike I commute on. Sachs sold off it's division that makes this kit, a German bike company called Hudson now manufactures it, and there is a Taiwanese clone (many parts are interchangeable) called pro-Rotary. It complies with restrictions that apply in Europe, Australia, and I believe Canada, that primarily dictate 200W max output, which is about what an average person can produce. But as we all know, not all the time! 200W gets you about 30km/h.