Originally Posted by larry e.
yeah i personally wouldnt think that is damage either.
While you can do it, I'm not convinced that threading a threadless fork is a good thing, based soley on the experience of dokushoka who got Bernie Mikkelsen (very experienced frame builder), to turn his threadless fork into a threaded one.
Bernie ended up replacing the threadless steerer tube with a threaded one.
I can't remember the details, but Bernie doesn't mess about or do work needlessly. So I'm guessing that most threadless forks probably don't have sufficiently burly steerers for this to work safely. Not saying you can't but Bernie knows his stuff.
[Edit: just found the thread were its discussed]
Dokusha's reply to someone asking about why not just thread his threadless fork was
Originally Posted by dokushoka
I asked Bernie this very question when he plugged and welded my fork. He looked at me like I was crazy and said that they all eventually strip. I didn't get it right away, but, if you look at the thickness of the tubing on the steerer tube on a threadless fork and then compare that to a threaded one...
If you're gonna get your fork welded, get someone good. There are not many people I would trust to do this modification...