Originally Posted by Road Fan

I think it was not Ti-bolt but Ti body. And the real Ti ones are stamped "TITANIUM," not "DUOPAR ECO."

I've never seen one designed to have a nut affixed to the bolt on the back of the dropout. Think about it: if a Campy Nuovo Record or a Rallye did not require it, why would a Duopar? If a Jubilee had it, I don't understand why.