Is that 1", or 1-1/8" threadless?
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I don't own a camera I'm afraid. You're dealing with a real poor soul here 
I measured the headset and fork to double-check, though:
The headset is 1 1/8'' diameter as measured from the adjustable cup. The fork steerer tube is 1'' diameter, and the stem tube (quill?) is 1'' diameter. The new fork matches the size of the old one (besides being uncut) and is threadless.
I'm going to say that my frame was designed for the 1 1/8'' headset, because that appears to be what it came with.
Am I reading your last post right in guessing that I will need a new stem, but not necessarily a new headset?
I measured the headset and fork to double-check, though:The headset is 1 1/8'' diameter as measured from the adjustable cup. The fork steerer tube is 1'' diameter, and the stem tube (quill?) is 1'' diameter. The new fork matches the size of the old one (besides being uncut) and is threadless.
I'm going to say that my frame was designed for the 1 1/8'' headset, because that appears to be what it came with.
Am I reading your last post right in guessing that I will need a new stem, but not necessarily a new headset?
What you need is a threaded to threadless adapter. Its a tube that extends the steerer tube. Some bike stores should have it.
Most 1 1/8" steerer tubes were in the late 90s/ early 2000s during transition from threaded to threadless. Any threadless fork can always be threaded w/ a fork tap.
Basically, what you are looking for is this guy:
![]()
Then you will indeed need a new stem.
Most 1 1/8" steerer tubes were in the late 90s/ early 2000s during transition from threaded to threadless. Any threadless fork can always be threaded w/ a fork tap.
Basically, what you are looking for is this guy:
Then you will indeed need a new stem.
3
If your old fork is 1" threaded, your headset should be 1" threaded. So you would need a 1" threadless headset. From there, you will need a threadless stem.
Your current headset probably looks similar to this:
![]()
You'll need one of these:
![]()
And then you will need to either find a 1" threadless stem, or one of these:
![]()
and a 1-1/8" threadless stem. Possibly a shim for your bars as well. I have six threadless stem in my spares box right now.
Your current headset probably looks similar to this:
You'll need one of these:
And then you will need to either find a 1" threadless stem, or one of these:
and a 1-1/8" threadless stem. Possibly a shim for your bars as well. I have six threadless stem in my spares box right now.
When buying a new (or used) threaded fork make sure that the steerer tube is long enough or a tad longer and that the threaded portion is long enough. If you buy one with a longer steerer thinking you can cut it to length you might end up with not enough threads.... let's just say that this has been known to happen
D'oh!When buying a new (or used) threaded fork make sure that the steerer tube is long enough or a tad longer and that the threaded portion is long enough. If you buy one with a longer steerer thinking you can cut it to length you might end up with not enough threads.... let's just say that this has been known to happen
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