Originally Posted by j-roe
Hello. If a fork is modern and made in Italy and threaded, is the threading most likely Italian? I'm speaking of a Coppi fork. thank you.
Typically Italian forks and frames have threads that are Italian (different thread angle) however, that is not always the case. Related to the headset, you can use a British ISO thread on an Italian thread or vise verse, just as long as you don't swap back and forth, you'll be OK.
My Colnago has an Italian threaded fork, however I'm using a British threaded Campagnolo C Record Head Set.
Where the system will not be interchangeable is in the Bottom brackets due to cup size and thread direction.