Originally Posted by
toolong
I have an aluminum frame with a quill stem and a threaded headset. When I upgrade the fork, can I go with an unthreaded steerer if I replace the stem/headset? Will the frame take a normal headset?
Yes, you can.
And as you are aware, you will need to replace all threaded headset associated parts with threadless (or Ahead-set) parts. (ie upper & lower races, fork crown race, etc.)
The only caveat is to know what size you are starting with - either 1" or 1 1/8" - I'm lead to believe finding 1" threadless parts is getting more difficult.
Ask your LBS or bike-savvy friends for what's involved.
Dave