This question continues to confuse me. I was reading a Q&A response by Sheldon Brown here:
http://en.allexperts.com/q/Bicycle-R...d-fork-use.htm
The user asks:
Can I use a 1" threaded fork with a threadless headset?
The fork is long enough to work this way I was just wondering if it is OK.
The 1-1/8" to 1" adapter shim will cover the threads and I will use about 30 mm of spacers.
Sheldon replies:
This will work, though if you're using a threadless type stem, I would be a bit nervous if the threads extend below where the stem clamps on.
You might want to use a quill type stem, even if you use a threadless headset, if the threads are too long. The threading could act as a "stress raiser" if you clamp a stem so it is all on threaded material.
What I don't understand is
"You might want to use a quill type stem, even if you use a threadless headset" because I thought the dilemma here was just that, wanting to use a quill stem and being unable to do so because the OP had a threadless headset.