Carbon Seatpost preparation
05-17-22, 02:23 PM
#1
Full Member
Thread Starter
Join Date: Feb 2014
Location: Lehigh Valley
Posts: 247
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 122 Post(s)
Liked 53 Times
in
43 Posts
Carbon Seatpost preparation
How thoroughly do I need to remove grease from the seat tube, etc before installing a carbon seatpost in place of an alloy post?
Aluminum frame, if that matters.
Thanks
Aluminum frame, if that matters.
Thanks
05-17-22, 02:34 PM
#2
Senior Member
Join Date: Jan 2009
Location: San Diego, CA
Posts: 3,661
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 836 Post(s)
Liked 1,058 Times
in
742 Posts
Doesn't have to be sterile clean, just enough that when running your finger in the ST it comes out clean. Make sure to apply new grease or carbon paste.
Likes For Crankycrank:
05-17-22, 02:53 PM
#3
Senior Member
Join Date: Jul 2013
Location: Nor-Cal
Posts: 3,767
Bikes: lots
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 1958 Post(s)
Liked 2,932 Times
in
1,489 Posts
Likes For cxwrench:
Likes For KerryIrons:
05-18-22, 12:46 PM
#5
Senior Member
Join Date: Jan 2009
Location: San Diego, CA
Posts: 3,661
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 836 Post(s)
Liked 1,058 Times
in
742 Posts
+1. If you don't have any CF paste, try grease. Usually works fine. My neighbor weighs 260lbs. Never used anything on his CF seatpost except grease and never slips.
05-18-22, 02:13 PM
#6
Senior Member
Join Date: Jul 2013
Location: Nor-Cal
Posts: 3,767
Bikes: lots
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 1958 Post(s)
Liked 2,932 Times
in
1,489 Posts
Since you guys know more than me would you use grease w/ a carbon post and a carbon frame?
Likes For cxwrench:
05-18-22, 02:45 PM
#7
Senior Member
Join Date: Dec 2012
Location: North Central Florida
Posts: 821
Bikes: 2022 LiteSpeed CHEROHALA CITY, 2019 Canyon Roadlite 9.0 CF LTD, 2015 Giant FastRoad CoMax 1, 2001 Mongoose Pro Triomphe,
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 129 Post(s)
Likes: 0
Liked 84 Times
in
50 Posts
05-18-22, 06:01 PM
#9
Senior Member
Join Date: Jan 2013
Posts: 2,674
Bikes: too many sparkly Italians, some sweet Americans and a couple interesting Japanese
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 567 Post(s)
Liked 563 Times
in
405 Posts
Agree with Crankycrank, and while I have not seen it with bikes in industry we have had greases disagree with some carbon epoxies resins.
05-18-22, 09:20 PM
#10
Senior Member
Join Date: Jul 2013
Location: Nor-Cal
Posts: 3,767
Bikes: lots
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 1958 Post(s)
Liked 2,932 Times
in
1,489 Posts
Likes For cxwrench:
05-19-22, 07:58 AM
#11
Senior Member
Join Date: Jan 2009
Location: San Diego, CA
Posts: 3,661
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 836 Post(s)
Liked 1,058 Times
in
742 Posts
My whole point is that if you don't have any on hand and want to save $8+ and don't want one more tube of something that might get used every 2 years?? laying around it's OK to try without. I would agree that using the paste to begin with it the best choice if what I mentioned are not a concern for the user.
05-19-22, 08:18 AM
#12
Dead but dreaming
Join Date: Oct 2020
Location: Bay Area, CA (East Bay - Contra Costa County)
Posts: 423
Bikes: 2020 Santa Cruz Stigmata, 2022 Cannondale Synapse
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 171 Post(s)
Liked 326 Times
in
186 Posts
Exactly. Anyone that does any work with carbon parts should have carbon paste on hand. At the very least it allows you to use the lowest possible torque setting to clamp your carbon components.
Likes For KJ43:
05-19-22, 10:59 AM
#13
Method to My Madness
Join Date: Nov 2020
Location: Orange County, California
Posts: 3,641
Bikes: Trek FX 2, Cannondale Synapse, Cannondale CAAD4, Santa Cruz Stigmata GRX
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 1939 Post(s)
Liked 1,463 Times
in
1,012 Posts
I bought Finish Line Fiber Grip CF Bicycle Assembly Gel for just > $8 from Amazon.com 3 years ago, and still have quite a bit left. It is now just < $10 on Amazon.com. At either price it is safer (for me) just to use a little so I can slightly under torque the hidden seat post clamp to reduce the risk of cracking the clamp or the CF seat post, both of which are much more expensive.
05-19-22, 06:37 PM
#14
Advocatus Diaboli
Join Date: Feb 2015
Location: Wherever I am
Posts: 8,631
Bikes: Merlin Cyrene, Nashbar steel CX
Mentioned: 14 Post(s)
Tagged: 1 Thread(s)
Quoted: 4729 Post(s)
Liked 1,531 Times
in
1,002 Posts
Though assembly paste can scratch finishes, so I'd only use if you need it.
