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Trek Carbon Fiber Problem....headset(15 posts)

Trek Carbon Fiber Problem....headsetriderbobsocal
Sep 28, 2003 9:58 PM
Anyone have any advice on getting a headset off of my trek carbon fiber bike. LBS tried unsuccessfully but was scared they might break the frame or steerer tube. The LBS thinks that trek might of put the headset on in the factory and it created some sort of tight bond with the carbon. Any advice would be greatly appreciated. I would hate to think that I have a 4000 bike that can never have a headset replaced :)


re: Trek Carbon Fiber Problem....headsetXeo
Sep 28, 2003 10:05 PM
Well if the LBS doesn't have the means to remove the headset, I'd definitely have them contact Trek directly on your behalf.

Hey you might get a new frame out of this, not that you wanted it, but if it is bonded to the frame in some manner that would seem to be a factory defect and require a replacement.
re: Trek Carbon Fiber Problem....headsetriderbobsocal
Sep 28, 2003 10:25 PM
Is it safe to assume that headsets are put on in the factory? I know its the original one on the bike, since I bought it new.

thanks for the info
re: Trek Carbon Fiber Problem....headsetAtombomber
Sep 29, 2003 7:00 AM
You don't write what model Trek Carbon you have. The 5900 used a different headset size for the bottom than all other models. If it was bonded in is unknown.
BE CAREFUL!bludoggy
Sep 29, 2003 5:24 AM
inside of the head tube, there is sort of some 'butted' carbon that the headset race remover can get hung up on. If your not careful, you will engage that ridge where the two carbon tubes meet instead of the edge of the headset race. When that happens, and you start whacking on the remover, you will easily destroy the frame. What you have to do is keep the little whichamacallits on the headset remover compressed until they get past that ridge of carbon and make sure that they are in contact with the headset race. then it should pop out nice and easy. I know my post is a bit incoherent, but hopefully you are able to make sense of it.
ps, do let us know if this was, in fact, the problem you were experiencing.
re: Trek Carbon Fiber Problem....headsetRusty Coggs
Sep 29, 2003 5:35 AM
If it's a 5900,the lower cup is bonded in I beleive,otherwise,there really should not be an issue.
Yes, on 5900 you CAN NOT remove lower HS "nm"CARBON110
Sep 29, 2003 6:57 AM
Yes, on 5900 you CAN NOT remove lower HS "nm"riderbobsocal
Sep 29, 2003 8:05 AM
Thanks for the info. I have what I believe is a 5700 model. It was the last postal edition frame before the 5900. It looks very similair to the 5900 and it does have the 110 logos on the frame. I posted a picture if this helps.
I was trying to upgrade the headset from the Cane Creek S6 to a Chris King least that was my plan. My new plan is to take the bike to a trek store here in San Diego. I would assume they would know how to take it off or if it is possible.

I think that not being allowed to replace the headset sounds odd. It would be like buying a computer and not being able to change out the hard-drive. Anyway, I plan on taking the bike in on Thursday. I will post my ordeal for anyone interested.

Thanks to all of you who replied!!!

Yes, on 5900 you CAN NOT remove lower HS "nm"riderbobsocal
Sep 29, 2003 8:06 AM
Not possible,TJeanloz
Sep 29, 2003 8:12 AM
The 5700 was the 5900 with Ultegra instead of Dura-Ace. The lower headset cup cannot be removed, it is permanently bonded in. Even if you could remove it, it is a proprietary size, and nobody makes a replacement.

You are stuck with the Cane Creek lower assembly, though you can replace the top cup with a King or anything else. I have, however, never really understood headset snobbery, the CC headset should do the job well enough.
Not possible,Xeo
Sep 29, 2003 1:34 PM
Is this also the case with the 5200? When and if my current headset (cane creek) wears out I was planning on upgrading to King. In that event, the lower assembly is bonded to the frame?

Interesting if it is also true for the 5200 (I assume it is becasue afterall it is also a CF frame).

5200 is differentlaffeaux
Sep 29, 2003 1:37 PM
The 5200/500 frame is different from the 5700/5900 frame. You should not have the same problem on your 5200.
Which LBS are you taking your bike to? nmMShaw
Sep 29, 2003 9:25 AM
Which LBS are you taking your bike to? nmriderbobsocal
Sep 29, 2003 10:17 PM
Ok....I have decided after one of the posts here on the site and talking to several other folks (one really good bike mechanic) that it is possible to remove the lower cup on my headset. I plan on having it removed tomorrow. I will let everyone know how it turns out. Hell, if it works I will post a picture with the new King headset :) It has been explained that if use the headset tool coming in from the bottom and making sure you hit the cup lip that it would just pop right off. It might appear that its bonded if you look into the frame from the top, but this is supposedly not true.

More to follow:

Let us know if Trek warrantees it...TJeanloz
Sep 30, 2003 5:27 AM
Even if you can pound the cup out, which is probably possible - glue is only so strong, the lower race is an oddball (proprietary) size. Unless you're planning to replace the fork also, you can't use any stock lower cup/race setup. This was discussed ad nauseum when those frame came out.