Nope. Torque the stem properly and you might need some anti-slip paste in there and it'll be fine. You'll need some kind of paste/grease in there anyway as you can get galvanic corrosion.
Galvanic corrosion generally a worse problem with carbon seatpost and alloy frames because the seattube gets reamed for size and you have bare metal contact - made worse by exposure to water. Most stems an anodised and this help prevent corrosion but assembly paste is still a good idea as it provides additional friction / corrosion inhibiter.
Make mine an Italian, with Campagnolo on the side..
Galvanic corrosion happens between two different metals. How's it going to happen to carbon bars?
Because chemistry. Happens a lot the carbon seatposts in aluminium frames.
Well I never knew that. I know carbon will carry a current but I always assumed that the resin in carbon fibre would prevent galvanic corrosion.
As Monty Dog said it happens more at the seatpost/seat tube interface as it requires contact of the conducting materials via an electrolyte (aluminium forms a tough oxide layer which usually stops it, but when this is scratched, which is fairly easy sliding seatposts in and out of frames, it will happen) and with hard anodised, narrow contact points on stems it's less likely at the stem/handlebars but still possible.
I have both a carbon post in an alloy frame and an alloy post in a carbon frame, and use carbon assembly paste on both. Partly to deter corrosion and partly to stop them slipping.
Galvanic corrosion happens between two different metals. How's it going to happen to carbon bars?
Because chemistry. Happens a lot the carbon seatposts in aluminium frames.
daft question, can this happen the other way round???? where should you put carbon paste?
I'm not sure what you mean by the other way round? Do you mean an Alu post in a carbon frame?
Yeah, I've got carbon frame with Alu post. I never knew about this galvanic corrosion. Best get some paste on it, is assembly paste the same as carbon paste ?
nasha48
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Most people use an aluminium stem anyway.
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http://ma.ecsdl.org/content/MA2013-02/19/1765.full.pdf
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daft question, can this happen the other way round???? where should you put carbon paste?
I'm not sure what you mean by the other way round? Do you mean an Alu post in a carbon frame?
Well I never knew that. I know carbon will carry a current but I always assumed that the resin in carbon fibre would prevent galvanic corrosion.
As Monty Dog said it happens more at the seatpost/seat tube interface as it requires contact of the conducting materials via an electrolyte (aluminium forms a tough oxide layer which usually stops it, but when this is scratched, which is fairly easy sliding seatposts in and out of frames, it will happen) and with hard anodised, narrow contact points on stems it's less likely at the stem/handlebars but still possible.
Yeah, I've got carbon frame with Alu post. I never knew about this galvanic corrosion. Best get some paste on it, is assembly paste the same as carbon paste ?
Renthal do the same neat trick, and I can confirm you don't need paste with them.
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