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Carbon post stuck in aluminum frame.
What is the mechanism for this and is there are way to get it out and
prevent future freeze ups? Thanks, Wayne |
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#2
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Carbon post stuck in aluminum frame.
Wayne Pein writes:
What is the mechanism for this and is there are way to get it out and prevent future freeze ups? I haven't heard of this before but it is probably the same as in any kind of steertube. From the way you write this and that it is "stuck" makes me visualize a quill stem. The quill stem is dead! Dead! Dead! http://www.sheldonbrown.com/brandt/stuck-stem.html http://www.sheldonbrown.com/brandt/t...s-headset.html Use quill stems on antique bicycles and only for display purposes. Jobst Brandt |
#4
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Carbon post stuck in aluminum frame.
Wayne Pein wrote:
What is the mechanism for this and is there are way to get it out and prevent future freeze ups? Thanks, Wayne Sorry. I should have been more precise and said it is a seatpost. I'm also posting for a friend. The seatpost is a Deda Black Magic and the frame is a DeRosa Dual. Wayne |
#5
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Carbon post stuck in aluminum frame.
anonymous writes:
What is the mechanism for this and is there are way to get it out and prevent future freeze ups? I haven't heard of this before but it is probably the same as in any kind of steertube. From the way you write this and that it is "stuck" makes me visualize a quill stem. The quill stem is dead! Dead! Dead! http://www.sheldonbrown.com/brandt/stuck-stem.html http://www.sheldonbrown.com/brandt/t...s-headset.html Use quill stems on antique bicycles and only for display purposes. Did you read the subject? Sorry, not intending to be snarky, but .... Aluminum against carbon can produce the same corrosion and it doesn't matter whether the steertube or the stem is aluminum. The effect is the same. The only thing that I don't know is the rate of corrosion between carbon and aluminum compared to steel and aluminum. And to not answer the OP: whatever you do, when you get it out and get a new post, how's about an aluminum one? The Thomson Masterpiece is a beauty, light, and non-fred and comes in setback and no. Plus you can put anti-seize or grease on it to prevent your current plight. Anti-seize will have no effect on corrosion in this interface. People have prescribed this for ages with no demonstrable effect. Just get rid of the quill stem. This may require a new fork with a longer threadless steertube, that from my experience, is worth the effort. Jobst Brandt |
#6
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Carbon post stuck in aluminum frame.
Wayne Pein wrote:
What is the mechanism for this and is there are way to get it out and prevent future freeze ups? http://www.sheldonbrown.com/brandt/stuck-stem.html Sorry. I should have been more precise and said it is a seatpost. I'm also posting for a friend. The seatpost is a Deda Black Magic and the frame is a DeRosa Dual. That doesn't make much difference, the problem is the same although seatposts, when properly secured, do not pump water into the interface and don't seize up. When and if you get it out, make sure the post is well greased and the expander slot in the frame well plugged with grease to prevent water intrusion. Since this is essentially a static contact, it will not ingest water. Jobst Brandt |
#7
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Carbon post stuck in aluminum frame.
On Sat, 06 Aug 2005 02:35:43 GMT,
wrote: anonymous writes: What is the mechanism for this and is there are way to get it out and prevent future freeze ups? I haven't heard of this before but it is probably the same as in any kind of steertube. From the way you write this and that it is "stuck" makes me visualize a quill stem. The quill stem is dead! Dead! Dead! http://www.sheldonbrown.com/brandt/stuck-stem.html http://www.sheldonbrown.com/brandt/t...s-headset.html Use quill stems on antique bicycles and only for display purposes. Did you read the subject? Sorry, not intending to be snarky, but .... Aluminum against carbon can produce the same corrosion and it doesn't matter whether the steertube or the stem is aluminum. The effect is the same. The only thing that I don't know is the rate of corrosion between carbon and aluminum compared to steel and aluminum. And to not answer the OP: whatever you do, when you get it out and get a new post, how's about an aluminum one? The Thomson Masterpiece is a beauty, light, and non-fred and comes in setback and no. Plus you can put anti-seize or grease on it to prevent your current plight. Anti-seize will have no effect on corrosion in this interface. People have prescribed this for ages with no demonstrable effect. Just get rid of the quill stem. This may require a new fork with a longer threadless steertube, that from my experience, is worth the effort. Jobst Brandt Dear Jobst, For crying out loud--how many people have to tell you that the thread title and posts are about a seat post, not a quill stem? Carl Fogel |
#8
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Carbon post stuck in aluminum frame.
wrote: Wayne Pein wrote: What is the mechanism for this and is there are way to get it out and prevent future freeze ups? http://www.sheldonbrown.com/brandt/stuck-stem.html Sorry. I should have been more precise and said it is a seatpost. I'm also posting for a friend. The seatpost is a Deda Black Magic and the frame is a DeRosa Dual. That doesn't make much difference, the problem is the same although seatposts, when properly secured, do not pump water into the interface and don't seize up. When and if you get it out, make sure the post is well greased and the expander slot in the frame well plugged with grease to prevent water intrusion. Since this is essentially a static contact, it will not ingest water. Jobst Brandt I think it is very silly to advise the use of grease on a carbon seat post. Higher clamping forces would be required as a result, which might distort the post harmfully. See many previous debates on this topic here on r.b.t. Another solution is to remove the post every year, wiping it and the inside of the seatpost clean. I am forced to do this every six months on my Campag Record post and Colnago aluminium frame since the grit build-up causes all those weird ticking sounds that I love to hate . . .. /Robert p.s. on the subject of which end of the bike the OP was referring to, I've never heard of a carbon quill stem on a threaded fork, have you? :-/ |
#9
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Carbon post stuck in aluminum frame.
colnalu wrote:
wrote: Wayne Pein wrote: What is the mechanism for this and is there are way to get it out and prevent future freeze ups? http://www.sheldonbrown.com/brandt/stuck-stem.html Sorry. I should have been more precise and said it is a seatpost. I'm also posting for a friend. The seatpost is a Deda Black Magic and the frame is a DeRosa Dual. That doesn't make much difference, the problem is the same although seatposts, when properly secured, do not pump water into the interface and don't seize up. When and if you get it out, make sure the post is well greased and the expander slot in the frame well plugged with grease to prevent water intrusion. Since this is essentially a static contact, it will not ingest water. Jobst Brandt I think it is very silly to advise the use of grease on a carbon seat post. Higher clamping forces would be required as a result, which might distort the post harmfully. See many previous debates on this topic here on r.b.t. I have to ask, does anyone have any proof that "higher clamping forces" are required to keep a greased post in place? Another solution is to remove the post every year, wiping it and the inside of the seatpost clean. I am forced to do this every six months on my Campag Record post and Colnago aluminium frame since the grit build-up causes all those weird ticking sounds that I love to hate . . . The reason you're "forced" to do this is that, otherwise, you might face a "frozen" stem or post. /Robert p.s. on the subject of which end of the bike the OP was referring to, I've never heard of a carbon quill stem on a threaded fork, have you? :-/ Robin Hubert |
#10
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Carbon post stuck in aluminum frame.
Robin Hubert wrote: colnalu wrote: wrote: Wayne Pein wrote: What is the mechanism for this and is there are way to get it out and prevent future freeze ups? http://www.sheldonbrown.com/brandt/stuck-stem.html Sorry. I should have been more precise and said it is a seatpost. I'm also posting for a friend. The seatpost is a Deda Black Magic and the frame is a DeRosa Dual. That doesn't make much difference, the problem is the same although seatposts, when properly secured, do not pump water into the interface and don't seize up. When and if you get it out, make sure the post is well greased and the expander slot in the frame well plugged with grease to prevent water intrusion. Since this is essentially a static contact, it will not ingest water. Jobst Brandt I think it is very silly to advise the use of grease on a carbon seat post. Higher clamping forces would be required as a result, which might distort the post harmfully. See many previous debates on this topic here on r.b.t. I have to ask, does anyone have any proof that "higher clamping forces" are required to keep a greased post in place? I have, which is why I do not grease the post. Another solution is to remove the post every year, wiping it and the inside of the seatpost clean. I am forced to do this every six months on my Campag Record post and Colnago aluminium frame since the grit build-up causes all those weird ticking sounds that I love to hate . . . The reason you're "forced" to do this is that, otherwise, you might face a "frozen" stem or post. No, not "the" reason. Re-read my text. I remove the post to get the grit and **** out the interface, reducing creaking noise. I do agree, however, that this cleaning process may well prevent a seat post from seizing - after all, mine never has. /Robert |
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