Lubricant on the seatpost?

wilshawk

Putting a new seatpost in, reckon I should smear a bit around the base of the seatpost where it slots in to the frame? or is it not neccessary or a bad idea ? Thanks.

pneumatic

Definitely a good idea: counter-intuitively, this is a very good way to stop the post from slipping.

dennisn

Grease it up. A siezed seatpost is no fun at all as has been mentioned many times on this forum. Any old grease will do.

dmch2

You can see all the issues with my hybrid's seized post on the workshop forum if you like...

I double checked on my new road bike and the shop hadn't greased it. I did so straight away.

father_jack

t. I did so straight away.

You mean you didn't make a cup of tea first? I doubt it would have seized in between your brew.

Mad Roadie

use liquid graphite - grips under pressure, slips when not

dmch2

Father Jack wrote:

t. I did so straight away.

You mean you didn't make a cup of tea first? I doubt it would have seized in between your brew.

aha! I've just discovered the 'quote' button rather than doing it by hand!

I'd just come home from getting the bike - I wanted to get on it soon as possible! Plenty of time for tea once it's gone dark. Although I must make a cup now I think

ChrisSA

Copper grease.

wilshawk

okay I did put some grease on the post, also I cleaned a bit down the hole, got some old grime out, this may not have been wise, now everything is so slick and clean...the seat post seems to slide all too easily. After battlign with the allen key for a while I got it as tight as I could, but it still slips down when I sit on it (or just push it with hand), now what can I do to make it stay put? a bit of talc perhaps? any ideas?

dmch2

How much grease did you use? It only needs a smear (so the post should show through it)

anto164

lube the shaft before sliding it in.

It'll leave any excess lube at the entrance because of the tightness of it.

wilshawk

I put on quite a bit at first, although after I wiped of as much as I could and it still slipped.

simon_e

Standard Lithium (white) grease such as Weldtite is ideal.


I have read that you should not use grease for carbon components - use Carbon Assembly paste instead.

pneumatic

ok,silly question, but I've been there myself:

New seatpost - are you sure it is the right size? These things are measured in nanometres (well, not quite, but you can't do it without calipers) and it is easy to get it wrong.

Just a thought.

keef66

If it's a carbon post, you're better off using carbon assembly paste. Really grips the thing securely and you don't have to swing too hard on the allen key.

cougie

Yes nobodys asked what materials you have there ?

In my carbon frame with a carbon seatpost I use hairspray to get it to stick. Before I used that - the thing would slide. After that - no problems.

ride_whenever

I tend to use assmbly paste even on alloy posts as it means you need a far lower clamping force, which is nice!

dmch2

I was going to ask why some say copper grease and some say lithium grease (I have both and used the latter). now I see carbon specific grease mentioned. My post is carbon but the frame is ali and it seems clamped up quite happily so should I just leave it?

dennisn

Simon E wrote:

I have read that you should not use grease for carbon components - use Carbon Assembly paste instead.

I think that is more of an effort to sell you someting "special" as opposed to actual fact.
You've GOT to have a torque wrench, GOT to use a SPECIAL paste, type of thing.
I used plain grease on my carbon seatpost for 3 years. No problems.

Radioactiveman

I use this on my carbon seatposts, seems to work quite well, allegedly increase friction between the post and frame as well as preventing seizing

http://www.chainreactioncycles.com/Mode ... elID=26768

daviesee

anto164 wrote:

lube the shaft before sliding it in.

It'll leave any excess lube at the entrance because of the tightness of it.

The above may very well be true............

but it reads wrong

Probably just me though :oops:

fast as fupp

daviesee wrote:

anto164 wrote:

lube the shaft before sliding it in.

It'll leave any excess lube at the entrance because of the tightness of it.

The above may very well be true............

but it reads wrong

Probably just me though :oops:

not just you

*stiffens*

Headhuunter

Does anyone actually bother using a torque wrench for carbon seatposts? Or am I OK tightening it like a normal metal one?

ketsbaia

Headhuunter wrote:

Does anyone actually bother using a torque wrench for carbon seatposts? Or am I OK tightening it like a normal metal one?

I haven't got a torque wrench - I just remember how many complete circles I've loosened the bolt, then tighten it the same amount. Highly technical stuff.

dodgy

One of the few components I bother to use a torque wrench on. Definitely worth it in my opinion, I just use the cheap ritchey one which is preset at either 5 to 6nm.

ilm_zero7

Headhuunter wrote:

Does anyone actually bother using a torque wrench for carbon seatposts? Or am I OK tightening it like a normal metal one?

yes use a torque wrench - everytime - correctly set of course, but stop before it clicks out, under tightened is better than cracked!

Radioactiveman

superstar also do a preset 5Nm torque tool aimed at seatposts and stems

http://superstar.tibolts.co.uk/product_ ... cts_id=387

Pross

anto164 wrote:

lube the shaft before sliding it in.

It'll leave any excess lube at the entrance because of the tightness of it.

Please tell me that was a deliberate bit of Carry On as I can't believe anyone typed that accidently!