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Old 10-23-08, 02:31 PM   #1
flyguy676
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Carbon on carbon rules?

what are the rules for attaching say a carbon frame and seat post or a stem to a fork? Do you grease it or leave it clean? I know if you do it wrong it can bond.
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Old 10-23-08, 05:06 PM   #2
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leave it clean or apply carbon prep compound.
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Old 10-23-08, 08:21 PM   #3
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Quote:
Originally Posted by flyguy676 View Post
what are the rules for attaching say a carbon frame and seat post or a stem to a fork? Do you grease it or leave it clean? I know if you do it wrong it can bond.
If you put nothing in between the interface they will seize (seatpost/seattube). Stems i'm not sure about, i'm sure that you do NOT put anything on the clamp area.

For the seatpost either use something like tacx carbon seatpost "grease" or if you put it in dry then you regularly take it out to prevent seizing.
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Old 10-24-08, 05:12 AM   #4
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Dry surface against dry surface is not very often the best answer to engineering problems. But you may get away with it on something as simple and understressed as a bike. Personally I wouldn't risk it due to the possibility of bonding, as has been said.

Regular grease has gotten a bad rep where carbon is concerned, because of slippage issues due to the very slick surfaces. That's why the "gritty" carbon prep compounds were invented. But regular grease can be perfectly okay. My carbon frame came with a roughened seatpost internal wall and has absolutely no problems with a smooth carbon post lubed with regular grease.
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