Genuine DT Swiss Freehub body conversion kit includes freehub body and drive side end cap. Ratchet EXP freehub fits only DT aftermarket hubs and higher end wheels using the Ratchet EXP system Freehub features premium custom made DT Swiss steel bearings Requires no specialist tools to install although you may need a vice and soft jaws to remove the current end cap if it's too tight to remove by hand If servicing the ratchets when installing the new freehub we strongly recommend using DT's specialist molycote grease only a very small amount is required