DT-Swiss Star Ratchet - Service Kit 54T

The engagement angle is the angle in degrees that a hub freewheel rotates in the void before it can convert the crank's rotational movement into forward motion. The smaller the angle, the faster the leg power reaches the ground. However, it is important to know that there are limits to the minimum possible angle, as the reliability of the freewheel system also partially depends on the angle. What makes Ratchet System hubs truly unique is the fact that all the teeth of the two discs engage simultaneously each time. In contrast, with pawl hubs, only some pawls engage simultaneously. Additionally, the contact surface in pawl hubs is quite small, whereas in the Ratchet System, the entire face surfaces engage, resulting in much lower point stress. This results in the legendary reliability of the Ratchet System hubs and, when the toothed discs are turned against each other, the unmistakable sound!