Freehub: Shimano trademark for a rear hub in which the freewheel mechanism is built into the hub itself, rather than being part of the sprocket cluster. Most freehubs use a cassette of sprockets.
Cassette: A cluster of sprockets and spacers designed for use on a freehub.
So since shaimaNO has registered he name "Freehub" most every other hub manufacturer will use "Cassettehub" in place of the other name. So in essence ther is no difference just the name.
Last edited by Precision Pedal; 06-28-02 at 08:15 AM.