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1" Headset Question

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Old 10-16-06, 02:04 PM
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Steev
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1" Headset Question

I recently acquired an Argon18 Radon frame. This is an older one and came with a Campy 1" threadless headset, but no fork as the original has a cracked drop-out. Eventually I'll get a new carbon fork and a stem to go with it, but right now I don't have the cash on hand. I'd really like to build the bike up and ride it now. I do have an old frame with a 1" threaded fork that seems to have just the right length of steerer, a few quill stems and a collection of 1" threaded headset parts, but as I search through this stuff, there doesn't seem to be a crown race. I'm wondering is it possible to use the crown race and bearing from the Campy headset with an appropriate threaded top bearing and the threaded fork so I can ride the bike now while saving to get a new fork and stem?
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Old 10-16-06, 02:58 PM
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Sheldon Brown
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Originally Posted by Steev
I recently acquired an Argon18 Radon frame. This is an older one and came with a Campy 1" threadless headset, but no fork as the original has a cracked drop-out. Eventually I'll get a new carbon fork and a stem to go with it, but right now I don't have the cash on hand. I'd really like to build the bike up and ride it now. I do have an old frame with a 1" threaded fork that seems to have just the right length of steerer, a few quill stems and a collection of 1" threaded headset parts, but as I search through this stuff, there doesn't seem to be a crown race. I'm wondering is it possible to use the crown race and bearing from the Campy headset with an appropriate threaded top bearing and the threaded fork so I can ride the bike now while saving to get a new fork and stem?
Should work fine. The "threaded/threadless" issue only involves the top of the steerer, has nothing to do with the crown race, nor with the frame's head tube. (With the exception of frames designed for the $#&[email protected]!$# "integrated" headsets, but I never heard of one of these in the 1" size.)

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Old 10-16-06, 02:59 PM
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Little Darwin
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The official line... No! Never mix parts! You will die a horrible death when the front of your bike literally explodes at the most inopportune time! If it doesn't explode it will most surely implode the first time you hit a bump at 40 mph on a sharp left turn with a 723+ foot drop off the right side of the road.

Seriously, in my opinion (no experience) I would put it together and see whether it seems to connect securely and work without play and/or binding. If it does, you are golden. As long as it will stay in place, and does what it is supposed to do, you will be fine... keep your eye on it, as you always should anyway and take action if needed.

The only significant risk I envision if it seems to work OK is wearing races and bearings prematurely, but since you are looking for a temporary solution I wouldn't worry about that other than keeping it adjusted and checked.
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Old 10-16-06, 10:42 PM
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Originally Posted by Steev
I recently acquired an Argon18 Radon frame. This is an older one and came with a Campy 1" threadless headset, but no fork as the original has a cracked drop-out. Eventually I'll get a new carbon fork and a stem to go with it, but right now I don't have the cash on hand. I'd really like to build the bike up and ride it now. I do have an old frame with a 1" threaded fork that seems to have just the right length of steerer, a few quill stems and a collection of 1" threaded headset parts, but as I search through this stuff, there doesn't seem to be a crown race. I'm wondering is it possible to use the crown race and bearing from the Campy headset with an appropriate threaded top bearing and the threaded fork so I can ride the bike now while saving to get a new fork and stem?
Most 1" cup-and-cone headsets are designed for 5/32" bearing balls (some for 3/16"). I believe that if the bearing balls are the same size, there should be no problems mixing races from mismatched headsets. Obviously you need to make sure that the races physically fit the frame and fork, but since the pressed crown race and cups are already in place, you'll have no problems there. It sounds like all you need is a suitable 1" threaded adjustable race and locknut.

I personally have mixed and matched 1" headset parts with reckless abandon, with good results It looks pretty weird to have a silver cups with a black locknut and adjustable race, but... who cares
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Old 10-17-06, 09:41 AM
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Well I tried it last night. Would have been great except the fork needed to be about 2mm longer in the steerer. It was long enough that I could get the threaded race on and see that it will work, but I was left with about two threads above the race to get the locknut on.
There's a nice Columbus fork on Craigslist for cheap, but I think I'll just save my cash for the carbon fork that I really want.
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