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In this video, learn more about the structure and function of a 3-speed hub gear. The heart of the hub gear is a planetary gear. With the help of clutches, in first gear the drive is via the ring gear and the output via the planet gear carrier (web). In second gear, the so-called direct drive, the hub is driven directly via the pinion. In third gear the drive is via the planet gear carrier and the output via the ring gear. The individual gears are shifted using a sliding clutch that engages the respective components in a sliding manner. So that the wheel can continue to turn even when the pedals are stationary, a total of two freewheels are implemented with the help of pawls (overrunning clutch).