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threadless steerer and stem - grease or not?(5 posts)

threadless steerer and stem - grease or not?DaveG
May 28, 2001 9:33 AM
Last time I re-installed by stem I did not grease the stem. Looking at a couple of maintenece books its unclear to me whether grease should be applied or not. I've gotten mixed responses from others on this. This is with an aluminim stem and steel steerer. Should I grease or not?
re: threadless steerer and stem - grease or not?ScottV
May 28, 2001 12:58 PM
No you should not put grease on the area where your stem contacts the steerer.
any good reason not to grease?C-40
May 28, 2001 1:41 PM
Greasing a steel steerer will certainly help to prevent corrosion between the aluminum and steel, if the bike is ever wet.

If you think it might contribute to the stem slipping, you're over estimating the forces on the stem.
re: threadless steerer and stem - grease or not?Larry Meade
May 29, 2001 9:36 AM
If dealing with a steel or aluminum steerer, it doesn't hurt to put a light coat of grease on the steerer tube. It will help prevent corrosion between the stem and steerer. IF you are dealing with a carbon steerer do not grease it as it can break down the composite and weaken the tube.
No grease on Carbon? What about...Tommy B
May 30, 2001 12:33 PM

If what you said about grease "breaking down the composite and weakening the tube" is true then I'm really glad I read this post!

I assume this would apply to greasing a carbon seat post into a steel seat tube, right? Is there a type/brand of grease that would be safe for carbon fiber? Obviously, I'm not intending to use grease to prevent galvanic action (the post "freezing" in the seat tube) but I thought lubing it would prevent it from getting scratched when removing/adjusting it.

FWIW, it's a USE Alien carbon post (no clearcoat on the CF, so it seems it would be more prone to damage) and a brand new custom built steel frame (seat tube doesn't look perfectly smooth and clean inside).

Sorry to go off-topic, but any help would be appreciated!