The Ratchet LN freehub body upgrade kit makes it possible to convert DT Swiss 3-Pawl hubs to the beloved Ratchet System. With just a few simple steps, it is possible to incorporate the benefits of Ratchet Systems, such as the outstanding reliability and adaptability of the engagement angle. Ratchet LN freehub bodies have a freehub system seal designed into it, allowing the conversion of 3-Pawl driven hubs to the Ratchet LN. It's an ideal upgrade for hubs such as the 360 and 370 series.. Item Specifications: Cassette Body Type: / 11 Speed Road, Cassette Body Type: / 8, 9, 10 Speed, Material: Aluminum,