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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 01-27-06, 10:39 AM   #1
ch0mb0
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when headsets strip

It appears that the threading on the topmost portion of my FSA headset is stripped, or something.

When attempting to tighten the locknut, it slips. It doesn't spin around freely, but it's definitely loose and after riding a few miles must be tightened up again (as far as it will go before it slips - it never gets too tight).

Can I just replace the top sections of this headset with another? are these things universal or what?
Anyone had to deal with this sorta thing before?

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Old 01-27-06, 10:41 AM   #2
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I'm assuming that this is on the pursuit with a 1" threaded headset?

did you check to see if it's the threads on the headset or on the fork?
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Old 01-27-06, 10:42 AM   #3
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Do you have enuf thread on the fork? You can use any threaded locknut with it. If you have stripped it out I would recommend a steel one.
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Old 01-27-06, 10:42 AM   #4
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i had that same problem (or at least it sounds very similar) with an old headset once. i dunno how but the LBS fixed it with no new parts. i think it involved locktite...
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Old 01-27-06, 11:22 AM   #5
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ugh. excellent diagram. sorry i have no expertise to add.
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Old 01-27-06, 11:22 AM   #6
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Quote:
Originally Posted by wangster
I'm assuming that this is on the pursuit with a 1" threaded headset?
did you check to see if it's the threads on the headset or on the fork?

naw, this is the GT. upon clozer inzpection I found the telltale hair-thin strands of metal inside the locknut. didn't see that before - maybe the LBS could hook me up with one and I be good to go.

(I hope it's that easy - but it's been a rough week on yours truly o my brothers)
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Old 01-27-06, 11:29 AM   #7
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You have to be realy ****ing dumb to strip a headset.
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Old 01-27-06, 11:54 AM   #8
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Originally Posted by dirty cookie
ugh. excellent diagram. sorry i have no expertise to add.
Agreed. Was that photoshop? I need to get some of these skillz.
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Old 01-27-06, 12:09 PM   #9
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Ok I should learn to read. If it never gets too tight but slips constantly then there is something wrong with the threads somewhere.

One thought would be that you don't have enough threads on your fork and all the stress is taken by a few threads on the locknut, which may have failed. Pull the locknut off and look at the the fork threads and the locknut threads. Striped threads should be obvious.

Also check you have a situation like in the diagram below. You want as much of the locknut to thread on to the fork column as possible while still leaving a gap.

I'll leave my original post in just case and so I can be mocked.

Orig bit
---------
I bet you need a spacer under the locknut.

The top locknut is probably bottoming out on the top of the fork so while it gets tight, its not not actually contacting the cup/cone together and so everything is still loose.

Pull your stem out. There should be a small gap between the top of the fork and the locknut.

See attached picture for what it should look like. Read the text at:
http://www.parktool.com/repair/readhowto.asp?id=127
Attached Images
File Type: jpg fork22.jpg (13.9 KB, 12 views)

Last edited by fixedpip; 01-27-06 at 12:15 PM.
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Old 01-27-06, 12:27 PM   #10
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Unmatched threading? English thread VS Italian thread VS French thread
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Old 01-27-06, 01:48 PM   #11
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ckeck the locknut, it could be cracked....its happened to me before, or the locknut may be stripped... i dont think it should be that big of a hassle to fix
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Old 01-27-06, 02:53 PM   #12
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It was the locknut. Threading was screwed up. Things are good for the moment.

Backstory on this: bought the frame with headset, checked it over and it seemed okay at the time. May not have been the case. Replacement works out.

Thanks for your help & advice!
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Old 01-27-06, 03:31 PM   #13
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is this a new frame? when'd you get it?
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