Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Mysterious ticking/creaking seatpost: Why?

Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

Mysterious ticking/creaking seatpost: Why?

Old 07-01-13, 01:09 PM
  #1  
Senior Member
Thread Starter
 
Join Date: Mar 2006
Location: Montreal, Canada
Posts: 59

Bikes: '89 Cannondale SC600, '05 Marin Fairfax, '10 Specialized Roubaix Elite Compact

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Mysterious ticking/creaking seatpost: Why?

My 2010 Specialized Roubaix Expert developed an annoying ticking/cracking sound. I found that the noise was coming from the frame where the seatpost is deeply inserted (carbon seatpost/carbon frame). I took the seatpost out, wiped it down and re-installed it. Voilà, the noise gone.

While I am certainly glad that the noise is gone, if anyone could enlighten me as to what would cause such a noise, I would really appeciate it.

Thanks,
Hoang is offline  
Old 07-01-13, 04:23 PM
  #2  
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 38,317

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

Mentioned: 137 Post(s)
Tagged: 1 Thread(s)
Quoted: 5588 Post(s)
Liked 2,187 Times in 1,230 Posts
As the tubing flexes the inner tube (the post) slides slightly within the outer (seat tube). You need to either grease it so it slips easily and silently, or use something with enough traction that it doesn't move at all. This sort of thing happens with all tube in tube assemblies.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

Just because I'm tired of arguing, doesn't mean you're right.

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is offline  
Old 07-01-13, 07:56 PM
  #3  
Senior Member
 
dsbrantjr's Avatar
 
Join Date: Sep 2010
Location: Roswell, GA
Posts: 8,319

Bikes: '93 Trek 750, '92 Schwinn Crisscross, '93 Mongoose Alta

Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 1438 Post(s)
Liked 1,091 Times in 722 Posts
Applying some carbon assembly paste will help to keep the seat post and tube from creaking and permit clamping the post securely without excessive clamp bolt torque.

A torque wrench is your friend when you own a carbon bike.
dsbrantjr is offline  
Old 07-02-13, 06:37 AM
  #4  
Senior Member
 
Bikedued's Avatar
 
Join Date: Jul 2004
Posts: 11,070
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 205 Post(s)
Liked 106 Times in 60 Posts
Even greased seatposts will creak in such a manner. They get dirt and sand slung into them by the rear wheel, and need to be cleaned and re-lubed periodically. It's just a fact of life.,,,,BD
__________________
So many bikes, so little dime.
Bikedued is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
BigC_82
Cyclocross and Gravelbiking (Recreational)
20
07-13-17 10:11 AM
Deontologist
Bicycle Mechanics
3
05-12-15 08:04 AM
landdnl
Bicycle Mechanics
8
05-12-12 08:23 PM
Dan The Man
Bicycle Mechanics
4
04-12-11 09:26 PM
Monkey Face
Bicycle Mechanics
8
07-19-10 01:49 AM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.