Go Back  Bike Forums > Bike Forums > Fifty Plus (50+)
Reload this Page >

Carbon seat post?

Notices
Fifty Plus (50+) Share the victories, challenges, successes and special concerns of bicyclists 50 and older. Especially useful for those entering or reentering bicycling.

Carbon seat post?

Old 10-17-19, 03:44 PM
  #1  
Helderberg
Senior Member
Thread Starter
 
Helderberg's Avatar
 
Join Date: Jul 2018
Location: Rolesville NC
Posts: 666

Bikes: Had an old Columbia in the 80's, here a used Schwinn hybrid, now a Cannondale Quick 3 and a Topstone 105..

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 189 Post(s)
Liked 164 Times in 87 Posts
Carbon seat post?

Has anyone here used a carbon seat post on a aluminum frame bike? My question is, does it have any effect on felt vibration? I realize it would not be the same as a carbon frame but I noticed a real improvement between my bike with a steel fork to carbon fork bike of the same make and model, so is there an improvement with the seatpost? Also, if you would recommend a brand it would be appreciated. Thanks in advance.
Frank.
Helderberg is offline  
Old 10-17-19, 05:09 PM
  #2  
TiHabanero
Senior Member
 
Join Date: Nov 2012
Posts: 3,354
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 1195 Post(s)
Liked 493 Times in 266 Posts
Although I had a steel frame, not aluminum, I was unable to detect any appreciable difference between a carbon post and aluminum post.
TiHabanero is offline  
Likes For TiHabanero:
Old 10-17-19, 05:35 PM
  #3  
caloso
Senior Member
 
caloso's Avatar
 
Join Date: Jul 2002
Location: Sacramento, California, USA
Posts: 39,909

Bikes: Ridley Excalibur, Gazelle Champion Mondial, On-One Pompino, Specialized Rock Hopper

Mentioned: 64 Post(s)
Tagged: 0 Thread(s)
Quoted: 2554 Post(s)
Liked 1,830 Times in 900 Posts
I have a carbon seat post on my Al crossbike. I don't think I could notice an appreciable difference in vibrations. That's mostly about tires in my case.

One thing to keep in mind with CF-Al interfaces is that you need to make sure you pull it out every once in awhile.
caloso is offline  
Likes For caloso:
Old 10-17-19, 06:37 PM
  #4  
Helderberg
Senior Member
Thread Starter
 
Helderberg's Avatar
 
Join Date: Jul 2018
Location: Rolesville NC
Posts: 666

Bikes: Had an old Columbia in the 80's, here a used Schwinn hybrid, now a Cannondale Quick 3 and a Topstone 105..

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 189 Post(s)
Liked 164 Times in 87 Posts
Thank you both for your responses.
Frank.
Helderberg is offline  
Old 10-18-19, 08:25 AM
  #5  
Biker395 
Seat Sniffer
 
Biker395's Avatar
 
Join Date: Sep 2007
Location: SoCal
Posts: 5,166

Bikes: 2008 Scott CR1 Pro; 2006 Schwinn Fastback Pro and 1996 Colnago Decor Super C96; 2003 Univega Alpina 700; 2000 Schwinn Super Sport

Mentioned: 17 Post(s)
Tagged: 0 Thread(s)
Quoted: 740 Post(s)
Liked 648 Times in 266 Posts
I have a carbon seat post on an Al bike with carbon seat and chainstays.

Zero difference with the carbon seat post.
__________________
Proud parent of a happy inner child ...

Biker395 is offline  
Likes For Biker395:
Old 10-18-19, 11:12 AM
  #6  
woodcraft
Senior Member
 
woodcraft's Avatar
 
Join Date: Apr 2012
Location: Nor Cal
Posts: 5,704
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 1677 Post(s)
Likes: 0
Liked 723 Times in 443 Posts
I find it makes a difference, but only a select few carbon posts have much flex.

My favorite is an older Specialized two-bolt w/ "zert" insert. A bit hard to find now.



The more current Specialized with one bolt is good as well, but the pivot mechanism is a PIA.

Velonews did a test in 2012 that was useful:


The FSA one is also hard to find- many (some at least) broke.
woodcraft is offline  
Likes For woodcraft:
Old 10-18-19, 11:12 AM
  #7  
BlazingPedals
Senior Member
 
BlazingPedals's Avatar
 
Join Date: Dec 2004
Location: Middle of da Mitten
Posts: 11,754

Bikes: Trek 7500, RANS V-Rex, Optima Baron, Velokraft NoCom, M-5 Carbon Highracer, Catrike Speed

Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 1239 Post(s)
Liked 356 Times in 235 Posts
Originally Posted by caloso View Post
One thing to keep in mind with CF-Al interfaces is that you need to make sure you pull it out every once in awhile.
You'd want to grease the interface and periodically remove and clean in any case of dissimilar materials. With a carbon seatpost, you'd use use carbon assembly paste instead of grease.
BlazingPedals is offline  
Likes For BlazingPedals:
Old 10-18-19, 11:23 AM
  #8  
CliffordK
Senior Member
 
CliffordK's Avatar
 
Join Date: Nov 2014
Location: Eugene, Oregon, USA
Posts: 24,969
Mentioned: 202 Post(s)
Tagged: 0 Thread(s)
Quoted: 13366 Post(s)
Liked 1,789 Times in 1,354 Posts
Originally Posted by caloso View Post
One thing to keep in mind with CF-Al interfaces is that you need to make sure you pull it out every once in awhile.
I would try to keep carbon in carbon, and aluminum in aluminum just to minimize reactions.
CliffordK is offline  
Likes For CliffordK:
Old 10-18-19, 11:30 AM
  #9  
nomadmax 
Senior Member
 
Join Date: Jun 2018
Location: SW Ohio
Posts: 1,757
Mentioned: 93 Post(s)
Tagged: 0 Thread(s)
Quoted: 784 Post(s)
Liked 1,042 Times in 527 Posts
I have a carbon seat post in an aluminum frame. I concur with above opinions, I can't feel any difference between the carbon post and an aluminum one.

nomadmax is offline  
Likes For nomadmax:
Old 10-18-19, 12:02 PM
  #10  
caloso
Senior Member
 
caloso's Avatar
 
Join Date: Jul 2002
Location: Sacramento, California, USA
Posts: 39,909

Bikes: Ridley Excalibur, Gazelle Champion Mondial, On-One Pompino, Specialized Rock Hopper

Mentioned: 64 Post(s)
Tagged: 0 Thread(s)
Quoted: 2554 Post(s)
Liked 1,830 Times in 900 Posts
Originally Posted by BlazingPedals View Post
You'd want to grease the interface and periodically remove and clean in any case of dissimilar materials. With a carbon seatpost, you'd use use carbon assembly paste instead of grease.
Yes, I discovered this with my first CF bike, a Trek 5200 that came stock with an Al seatpost. It had galvanically welded itself in there and the bike shop had to put it in a bench vise to get it out. Replaced it with a Specialized CF post which I've used for many years. Still should use assembly paste and take it out every once in awhile.
caloso is offline  
Likes For caloso:
Old 10-18-19, 12:05 PM
  #11  
horatio 
Hump, what hump?
 
horatio's Avatar
 
Join Date: Dec 2003
Location: SC midlands
Posts: 1,881

Bikes: See signature

Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 325 Post(s)
Liked 202 Times in 130 Posts
The carbon post seemed to help on my Specialized Secteur.
__________________
2010 AB T1X ** 2010 Cannondale SIX-5 ** 1993 Cannondale RS900 ** 1989 Bianchi Brava ** 1988 Nishiki Olympic ** 1987 Centurion Ironman Expert(2) ** 1985 DeRosa Professional SLX ** 1982 Basso Gap ** 198? Ciocc Designer '84 ** 198? Ciocc Competition SL ** 19?? Roberts Audax ** 198? Brian Rourke ** 1982 Mercian Olympic ** 1970 Raleigh Professional MK I ** 1952 Raleigh Sports
horatio is offline  
Likes For horatio:
Old 10-18-19, 12:09 PM
  #12  
Maelochs
Senior Member
 
Maelochs's Avatar
 
Join Date: Oct 2015
Posts: 12,684

Bikes: 2015 Workswell 066, 2014 Dawes Sheila, 1983 Cannondale 500, 1984 Raleigh Olympian, 2007 Cannondale Rize 4, 2017 Fuji Sportif 1 LE

Mentioned: 142 Post(s)
Tagged: 0 Thread(s)
Quoted: 6069 Post(s)
Liked 956 Times in 542 Posts
I swapped an Al seatpost for carbon on a my Dawes. I felt a very strong dampening of Placebo vibrations, which justified the cost of the post.
Maelochs is offline  
Likes For Maelochs:
Old 10-18-19, 12:12 PM
  #13  
Helderberg
Senior Member
Thread Starter
 
Helderberg's Avatar
 
Join Date: Jul 2018
Location: Rolesville NC
Posts: 666

Bikes: Had an old Columbia in the 80's, here a used Schwinn hybrid, now a Cannondale Quick 3 and a Topstone 105..

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 189 Post(s)
Liked 164 Times in 87 Posts
Originally Posted by woodcraft View Post
I find it makes a difference, but only a select few carbon posts have much flex.

My favorite is an older Specialized two-bolt w/ "zert" insert. A bit hard to find now.



The more current Specialized with one bolt is good as well, but the pivot mechanism is a PIA.

Velonews did a test in 2012 that was useful:


The FSA one is also hard to find- many (some at least) broke.
Thank you for this. I have found I really like the two bolt system that is on my Topstone and would like to maintain that and thought a carbon post would be a good addition.
Much appreciated,
Thank you all for the input, Frank.

Last edited by Helderberg; 10-18-19 at 12:16 PM.
Helderberg is offline  
Old 10-18-19, 04:41 PM
  #14  
mrt2you
Senior Member
 
Join Date: Mar 2010
Location: new berlin wi
Posts: 235

Bikes: trek 720 multitrack hybred, 92 trek 2300, 2010 specialized roubaix, 2014 specialized roubaix

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Likes: 0
Liked 15 Times in 12 Posts
if you get a $$$$ specialized CG-R seat post they make a big difference.

https://www.ebay.com/itm/Specialized...IAAOSwxbNdo96P
mrt2you is offline  
Likes For mrt2you:
Old 10-18-19, 06:59 PM
  #15  
woodcraft
Senior Member
 
woodcraft's Avatar
 
Join Date: Apr 2012
Location: Nor Cal
Posts: 5,704
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 1677 Post(s)
Likes: 0
Liked 723 Times in 443 Posts
For a non-setback post, probably makes no difference

other than a bit of weight.
woodcraft is offline  
Likes For woodcraft:
Old 10-19-19, 05:39 AM
  #16  
masi61
Senior Member
 
masi61's Avatar
 
Join Date: Oct 2005
Location: SW Ohio
Posts: 2,861

Bikes: Puch Marco Polo, Saint Tropez, Masi Gran Criterium

Mentioned: 22 Post(s)
Tagged: 0 Thread(s)
Quoted: 719 Post(s)
Liked 139 Times in 105 Posts
I’ve written about my Ritchey Superlogic “Flexlogic” post in another thread where I talked about my tiny (for me) titanium road bike that I made work for me. By having my 330mm post maxed out at the limit line.

I can’t validate the flex with an instrument but I suspect the fact that this setup has some flex is not a placebo.

A guy on our group ride the other night had an Ergon leaf spring type carbon post on it. I actually could see the flex while riding from the rear. He was having slippage issues and we got to rest and watch on the roadside while he slid the post out and played around with the 2 opposing carbon fiber half cylinders which he said adjusted the flex level.

Last edited by masi61; 10-19-19 at 02:21 PM.
masi61 is offline  
Likes For masi61:
Old 10-19-19, 08:04 AM
  #17  
Helderberg
Senior Member
Thread Starter
 
Helderberg's Avatar
 
Join Date: Jul 2018
Location: Rolesville NC
Posts: 666

Bikes: Had an old Columbia in the 80's, here a used Schwinn hybrid, now a Cannondale Quick 3 and a Topstone 105..

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 189 Post(s)
Liked 164 Times in 87 Posts
masi61 "I made work for me my having my 330mm post maxed out at the limit line".
This was my next question, is there more of an "effect" of vibration dampening when more of the post is exposed? My logic tells me that would be the case but having no personal experience for me it is just a guess? Thanks again for the feedback.
Frank.
Helderberg is offline  
Old 10-19-19, 02:25 PM
  #18  
masi61
Senior Member
 
masi61's Avatar
 
Join Date: Oct 2005
Location: SW Ohio
Posts: 2,861

Bikes: Puch Marco Polo, Saint Tropez, Masi Gran Criterium

Mentioned: 22 Post(s)
Tagged: 0 Thread(s)
Quoted: 719 Post(s)
Liked 139 Times in 105 Posts
Originally Posted by Helderberg View Post
masi61 "I made work for me my having my 330mm post maxed out at the limit line".
This was my next question, is there more of an "effect" of vibration dampening when more of the post is exposed? My logic tells me that would be the case but having no personal experience for me it is just a guess? Thanks again for the feedback.
Frank.
I believe that this particular setup has a nicely damped ride. Not buzzy at all. The fact that the frame is titanium Im sure helps too. Also my favorite saddle is the Selle Italia Turbomatic team. All the Turbomatic saddles Ive the past 25 years or so have always had compliance built into them thanks to the use of elastomers under the seat rails.
masi61 is offline  
Likes For masi61:
Old 10-19-19, 07:28 PM
  #19  
jppe
Let's do a Century
 
jppe's Avatar
 
Join Date: Oct 2004
Location: North Carolina
Posts: 8,000

Bikes: Cervelo R3 Disc, Pinarello Prince/Campy SR; Cervelo R3/Sram Red; Trek 5900/Duraace, Cervelo P2C/Duraace, Cannondle Tandem/Ultegra, Lynskey GR260 Ultegra

Mentioned: 55 Post(s)
Tagged: 0 Thread(s)
Quoted: 540 Post(s)
Liked 549 Times in 268 Posts
After doing some research I put one of the Specialized Zertz carbon posts on my titanium gravel bike when I was building it. I think I got it off eBay. Just make sure you get one long enough to insert far enough into the seat tube if you make a change.
__________________
Ride your Ride!!
jppe is offline  
Likes For jppe:
Old 10-20-19, 04:02 PM
  #20  
Maelochs
Senior Member
 
Maelochs's Avatar
 
Join Date: Oct 2015
Posts: 12,684

Bikes: 2015 Workswell 066, 2014 Dawes Sheila, 1983 Cannondale 500, 1984 Raleigh Olympian, 2007 Cannondale Rize 4, 2017 Fuji Sportif 1 LE

Mentioned: 142 Post(s)
Tagged: 0 Thread(s)
Quoted: 6069 Post(s)
Liked 956 Times in 542 Posts
Originally Posted by Helderberg View Post
.... is there more of an "effect" of vibration dampening when more of the post is exposed? .
Yes but also more load on the end of the post where it inserts. I eventually went back to Al because I broke two CF posts (very long posts at max exposure.) Depends on your body weight i'd guess.
Maelochs is offline  
Likes For Maelochs:
Old 10-20-19, 05:30 PM
  #21  
Helderberg
Senior Member
Thread Starter
 
Helderberg's Avatar
 
Join Date: Jul 2018
Location: Rolesville NC
Posts: 666

Bikes: Had an old Columbia in the 80's, here a used Schwinn hybrid, now a Cannondale Quick 3 and a Topstone 105..

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 189 Post(s)
Liked 164 Times in 87 Posts
Originally Posted by Maelochs View Post
Yes but also more load on the end of the post where it inserts. I eventually went back to Al because I broke two CF posts (very long posts at max exposure.) Depends on your body weight i'd guess.
And I would guess how much of the seat post would be exposed. I am not a svelte guy and my seat post has to be lengthened to attach the clamp on my bike stand. I think I just answered my own question. I will stick with the two bolt alum post that I have.
Thanks all for your input, Frank.
Helderberg is offline  
Old 10-22-19, 09:22 AM
  #22  
masi61
Senior Member
 
masi61's Avatar
 
Join Date: Oct 2005
Location: SW Ohio
Posts: 2,861

Bikes: Puch Marco Polo, Saint Tropez, Masi Gran Criterium

Mentioned: 22 Post(s)
Tagged: 0 Thread(s)
Quoted: 719 Post(s)
Liked 139 Times in 105 Posts
Originally Posted by Helderberg View Post
masi61 "I made work for me my having my 330mm post maxed out at the limit line".
This was my next question, is there more of an "effect" of vibration dampening when more of the post is exposed? My logic tells me that would be the case but having no personal experience for me it is just a guess? Thanks again for the feedback.
Frank.
I forgot to answer your question in my previous response - ...is there more of an effect of vibration dampening when more post is exposed?

Yes! There is. For Sure. Now this is not the straight one, it does have like 25mm of setback.

masi61 is offline  
Likes For masi61:
Old 10-22-19, 09:27 AM
  #23  
wphamilton
Senior Member
 
wphamilton's Avatar
 
Join Date: Apr 2011
Location: Alpharetta, GA
Posts: 15,251

Bikes: Nashbar Road

Mentioned: 71 Post(s)
Tagged: 0 Thread(s)
Quoted: 2909 Post(s)
Liked 308 Times in 205 Posts
Originally Posted by Helderberg View Post
masi61 "I made work for me my having my 330mm post maxed out at the limit line".
This was my next question, is there more of an "effect" of vibration dampening when more of the post is exposed? My logic tells me that would be the case but having no personal experience for me it is just a guess? Thanks again for the feedback.
Frank.
There would be "more" effect from a longer post, but from my research there isn't "any" vibration dampening effect from a straight carbon seatpost. Those which do have dampening effect are due almost entirely to the design at the saddle mount. So whatever additional dampening there might be, will be at best minimal.
wphamilton is offline  
Likes For wphamilton:
Old 10-22-19, 11:21 AM
  #24  
winston63 
Senior Member
 
winston63's Avatar
 
Join Date: May 2014
Posts: 692

Bikes: Specialized Diverge E5 Comp, Specialized AWOL Comp, Scott Solace 10

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 129 Post(s)
Liked 17 Times in 14 Posts
Originally Posted by mrt2you View Post
if you get a $$$$ specialized CG-R seat post they make a big difference.

https://www.ebay.com/itm/Specialized...IAAOSwxbNdo96P
Yes, I swapped out the stock aluminum seat post in my Diverge for one of those and it makes a big difference. But that's clearly due to the design, I don't know that a 'regular' carbon seat post would make any noticeable difference.
winston63 is online now  
Likes For winston63:
Old 10-22-19, 01:43 PM
  #25  
Biker395 
Seat Sniffer
 
Biker395's Avatar
 
Join Date: Sep 2007
Location: SoCal
Posts: 5,166

Bikes: 2008 Scott CR1 Pro; 2006 Schwinn Fastback Pro and 1996 Colnago Decor Super C96; 2003 Univega Alpina 700; 2000 Schwinn Super Sport

Mentioned: 17 Post(s)
Tagged: 0 Thread(s)
Quoted: 740 Post(s)
Liked 648 Times in 266 Posts
Originally Posted by woodcraft View Post
I find it makes a difference, but only a select few carbon posts have much flex.

Velonews did a test in 2012 that was useful:


The FSA one is also hard to find- many (some at least) broke.
Whoa ... that is interesting. I prefer zero-offset seatposts, and my CF bike has that Thomson seat post. Ooof.
__________________
Proud parent of a happy inner child ...

Biker395 is offline  
Likes For Biker395:

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.