Originally Posted by
Robvolz
nothing has snapped. it was tall. it came off a 60ctc colnago.
It is italian through and through. Previous owner ground the threads off to use a Threadless/clamp-on stem. Special place in hades I tell ya.
My thought is to have it French threaded for a French headset. Then I can still use it in a 56ctc bike.
It’s a little outside my field of (limited) expertise but I don’t think that story checks out.
The beginnings of some threading is visible at the top of the steerer.
If it were previously threaded the threads would have been cut at least 0.5mm into the steerer, meaning once ground off the remaining steerer would be no greater than 24mm OD. Unless they were filled rather than ground off but there’s no sign of that in the photos.
I stand by the view that the steerer has been cut, or broke, at the start of the threads. It may well have been used with a threadless headset thereafter. Not uncommon to cut the threaded end off a long fork steerer to use threadless on frame with a short head tube. Much easier than cutting more thread.