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seat post will not stay put.... after lbs visit

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seat post will not stay put.... after lbs visit

Old 05-26-10, 06:01 AM
  #1  
Smallguy
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seat post will not stay put.... after lbs visit

I took my bike in to get some work done because my bike was creaking and I needed a new head set

the guy working on my bike put allot of grease on my seat post and now it will not clamp and stay put

are they are tricks to getting to to stay put or should I just wipe off the huge clumps of white grease and leave a thin film and grease when ever I clean the bike

I assume grease should be used sparingly
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Old 05-26-10, 06:06 AM
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Take the bike back and have the service manager or head mechanic check it. I find it hard to believe that too much grease could be the problem. At the point where the seat post is clamped any excess would be squeezed out when tightened down. There's no point in guessing or trying to address it yourself when it is the shop's responsibility to return a functional bike. If you start trying to fix it they may claim you are the problem.
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Old 05-26-10, 05:05 PM
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Just a quick comment, which may or not be relevant...

If you have a carbon frame and/or carbon seatpost you may not want any grease at all, and instead may want to use a product such as Ritchey's "Liquid Torque", which is intended to increase, not decrease friction (while at the same time avoid creaking sounds).

I'm not plugging Ritchey products, at all, but their web site had a link to their installation guide for seat posts and saddles, which I thought was interesting, especially the comments about carbon seat posts on the 4th page:

https://www.ritcheylogic.com/media/Fi...engl_07_V2.pdf

Some carbon frame makers also advise not using grease on the seat post, as you might have to torque the seat post clamp too tightly to get a good enough grip. The Liquid Torque type product helps to avoid this issue.
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Old 05-26-10, 05:19 PM
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Maybe they were trying to make sure the creak wasn't coming from there, and didn't tighten/adjust the clamp the same way...did you readjust the clamp to see if the post no longer would slip?
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Old 05-26-10, 09:28 PM
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I had this happen on an older bike I bought off someone, and it turned out they had put a seatpost in that was just a bit too small (tenths of a mm). The problem only arose after I greased the dry seatpost, and I only realized what the problem's cause was when I tightened the binder bolt till the tube notch was actually closed and the post kept spinning. Just in case it's a used bike...
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Old 05-26-10, 09:31 PM
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Originally Posted by peripatetic View Post
I had this happen on an older bike I bought off someone, and it turned out they had put a seatpost in that was just a bit too small (tenths of a mm). The problem only arose after I greased the dry seatpost, and I only realized what the problem's cause was when I tightened the binder bolt till the tube notch was actually closed and the post kept spinning. Just in case it's a used bike...
been there, done that.

I had to use carefully open up the seat tube by using marginally larger seatposts until the intended size fit.
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Old 05-27-10, 06:23 AM
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I've tighten it down quite a bit I did wipe off some of the gobs of grease last night and I re-adjusted my seat post to it's proper height and marked it with a silver sharpie.

The seat post is the right size it is the stock post that came on the bike from trek

I'm hoping it will stay if not I might try out the liquid torque
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