1. Current steerer column is too short to be used with a threaded headset & stem
2. Current steerer column is not compatible with threaded headsets at all?
3. Current steerer column is currently 1" (25.4mm) diameter (22.2mm inside diameter)
4. New steerer column could be 1 1/8", or would it also have to be 1"? (
frame pic to estimate head tube diameter)
5. There aren't any aheadset stems to fit 1" steerer tube
6. Threadless system is about 300g lighter than threaded?
Thanks for any advice!
To answer these:
1) I think you meant to say threadless, in which case the answer is yes. But more importantly is that the current fork is not designed to be used with a threadless headset or stem. Clamping a threadless stem over the threads of a threaded steertube can be hazardous since the steertube is weaker there.
2) Correct, assuming you meant to say threadless.
3) Yes.
4) I would keep the current fork, honestly, but if you want to get another fork it would also have to be a 1" steertube
5) There are threadless stems out there for 1", but they are hard to find. The one that cyclocommute linked to looks solid, and the nashbar one I posted works just fine. I have the nashbar one on a threadless stem adapter on one of my bikes.
6) 300g seems a bit much, but I don't know any exact numbers, can't help you there.