I bought a Campagnolo Zonda C17 recently and noticed how quiet the ratcheting noise was. My friend owns a pair of Zondas but his one is really loud. why is mine silent? i use a 15 cassette.
New freehubs are quieter, because they have a thicker layer of grease between contact surfaces in the freewheel. The grease will eventually be pushed away from the surfaces, and the hub will develop the trademark sound in few thousand kilometers.