Gearing such high RPM down to a usable wheel speed can take several stages of gear reduction. This is heavy and wastes power and the efficiency advantage usually disappears. The tricky part is making a moderate speed motor that is also highly efficient. The Magmotor has a no load speed of about 4200 RPM which makes the speed reduction much easier. The Magmotor is made from two sturdy castings and a seamless body.
Some motors use a rolled can with the magnets glued in place.
Motors with rolled construction have been known to rip open under severe full-throttle direction changes. That can't happen with the Magmotor's one-piece construction. This is very handy for mounting encoders, fans, tachometers, brakes, or any other devices you might need. Some motors use an internal fan to keep them from overheating. The Magmotor is efficient enough to operate without a fan.