help :(
04-27-13 | 03:05 PM
#1
Thread Starter
I just wanna ride
Joined: Oct 2008
Posts: 1,155
Likes: 1
From: Chico Califo
Bikes: 2013 BMC Impec
help :(
So I noticed there was a crack all the way around the post a couple weeks ago, took it to a couple of shops and they confirmed my thoughts, just the paint cracking at the seam. Watch it closely but it's fine for now.
So today I was tuning things up for tomorrows ride and noticed the seat had play. Everything was tight so I knew it was dunzo. Rode down to the lbs and bought a new post since I need to be able to ride tomorrow and didn't have time to buy one online. Went to take out the old post and...
That thing is really wedged in there too. I had to try pretty damn hard to get it in, pulling it out is proving to be a toughy. Any advice
So today I was tuning things up for tomorrows ride and noticed the seat had play. Everything was tight so I knew it was dunzo. Rode down to the lbs and bought a new post since I need to be able to ride tomorrow and didn't have time to buy one online. Went to take out the old post and...
That thing is really wedged in there too. I had to try pretty damn hard to get it in, pulling it out is proving to be a toughy. Any advice
04-27-13 | 03:15 PM
#5
Your cog is slipping.
Joined: May 2009
Posts: 26,053
Likes: 100
From: Beverly MA
Bikes: EAI Bareknuckle
I would spray some WD40 or penetrating fluid (Liquid Wrench, etc) where the post meets the frame and let it sit for a while, then try twisting it. Because the post is useless at this point anyway, it will give you some much-needed leverage if you drill a hole straight through it about halfway down and stick a screwdriver through the hole.
Last edited by Scrodzilla; 04-27-13 at 03:19 PM.
04-27-13 | 06:34 PM
#7
THE STUFFED
Joined: Oct 2009
Posts: 12,671
Likes: 21
From: San Francisco, CA
Bikes: R. Sachs Simplicity; EAI Bareknuckle; Madone SLR9 Gen 8
Is the post carbon or aluminium?
In addition to the penetrating liquid, you can use either a hairdryer or heat gun to expand the seattube a bit to help.
You can always use a vise to clamp the seatpost and use the frameset sans wheels as leverage too.
In addition to the penetrating liquid, you can use either a hairdryer or heat gun to expand the seattube a bit to help.
You can always use a vise to clamp the seatpost and use the frameset sans wheels as leverage too.
04-27-13 | 06:54 PM
#8
Thread Starter
I just wanna ride
Joined: Oct 2008
Posts: 1,155
Likes: 1
From: Chico Califo
Bikes: 2013 BMC Impec
I just went with what scrod said. I wasn't going to try reattaching the post, so I drilled a 1/4" hole and tried using a screwdriver for leverage. It started to bend before the post moved so I increased the hole to 1/2" and tapped some ratchet extension thing through and with a good amount of effort was able to twist and pull it loose.
edit: carbon leuky
edit: carbon leuky
04-28-13 | 08:47 AM
#11
Brown Bear, Sqrl Hunter
Joined: Jul 2009
Posts: 4,244
Likes: 28
From: San Jose, CA
Bikes: CAAD 10 4, Dolan DF4, Fuji Track Classic
04-28-13 | 09:41 AM
#12
Senior Member
Joined: Sep 2010
Posts: 907
Likes: 13
From: Portland / ME
Bikes: CAAD10/Wabi
If it was metal I'd say drill a hole through stick a screwdriver through for extra torque, not sure about the crabon tho.
__________________
04-28-13 | 10:05 AM
#13
sɹɐʇsɟoןןnɟsʇıbɟɯo
Joined: Oct 2010
Posts: 3,986
Likes: 0
From: seattle, too many links
Bikes: fixed gear recumbent trike
pretty sure its carbon
04-28-13 | 01:28 PM
#14
Senior Member
Joined: Aug 2012
Posts: 2,828
Likes: 1
From: West Georgia
Bikes: K2 Mod 5.0 Roadie, Fuji Commuter
Grease it...............don't grease it. Stryper's problem makes me glad I haven't got around to doing anything yet.
04-28-13 | 02:14 PM
#16
Senior Member
Joined: Aug 2012
Posts: 2,828
Likes: 1
From: West Georgia
Bikes: K2 Mod 5.0 Roadie, Fuji Commuter
Somewhere on the LeaderUSA site it says to lightly grease the parts for "a bit of additional waterproffing". I didn't do it beacuse I just wasn't worried about it.
The steerer is carbon.
The steerer is carbon.
04-28-13 | 02:48 PM
#17
Your cog is slipping.
Joined: May 2009
Posts: 26,053
Likes: 100
From: Beverly MA
Bikes: EAI Bareknuckle
I understand your steerer is carbon, but that's not part of the headset.
At any rate, kids...grease and carbon don't play nicely with each other, as stryper now knows.
At any rate, kids...grease and carbon don't play nicely with each other, as stryper now knows.
04-28-13 | 10:31 PM
#18
Senior Member
Joined: Jul 2009
Posts: 206
Likes: 0
Hey not to bogart on this guys thread, but as it seems you've given him some advice: What if I used grease AND pulled my seatpost out and regreased it periodically as one should, but eventually MN winter riding caught up to me and its stuck? I've tried spraying a lot of wd 40 and tri-flowing it. Its the stock steal seat post, but as I'm poor I'd like to salvage it if possible. Any tips besides paying the LBS whats going to amount to over a hundred to get it out?
Edit: My frame is steel, by the by. An 08 maddie, as I understand you used to ride, actually.
Edit: My frame is steel, by the by. An 08 maddie, as I understand you used to ride, actually.
04-28-13 | 10:35 PM
#19
THE STUFFED
Joined: Oct 2009
Posts: 12,671
Likes: 21
From: San Francisco, CA
Bikes: R. Sachs Simplicity; EAI Bareknuckle; Madone SLR9 Gen 8
Hey not to bogart on this guys thread, but as it seems you've given him some advice: What if I used grease AND pulled my seatpost out and regreased it periodically as one should, but eventually MN winter riding caught up to me and its stuck? I've tried spraying a lot of wd 40 and tri-flowing it. Its the stock steal seat post, but as I'm poor I'd like to salvage it if possible. Any tips besides paying the LBS whats going to amount to over a hundred to get it out?
Edit: My frame is steel, by the by. An 08 maddie, as I understand you used to ride, actually.
Edit: My frame is steel, by the by. An 08 maddie, as I understand you used to ride, actually.
Except you would wrap up the seat clamp with a rag before clamping gingerly but secure.
04-28-13 | 10:48 PM
#20
Senior Member
Joined: Jul 2009
Posts: 206
Likes: 0
Is that some mechanical advantage you're spouting about? I could try the vice trick, as I do not know how I can get access to a heat gun. I'm kind of a dumb ogre who is apt to overtorque things, so if anyone has a more user-friendly suggestion I am open to it. Thanks though leuky.
04-29-13 | 07:37 AM
#21
Oh, man. There is so much conflicting information on the internet about grease and carbon fiber. Here is an article where both Lennard Zinn and Craig Calfee both recommend greasing carbon: https://velonews.competitor.com/2005/...ed-carbon_9023
Also, I recently talked to Trek's Tech Dept. about greasing Madone BBs and they said the PTFE grease we use was just fine.
The problem is so much of the "evidence" I can find of issues with carbon and grease seems anecdotal. If there is any validity to carbon expanding with certain types of grease, it would seem to be less of a problem than when steel bearing shells and aluminum clamps used with carbon get corroded terribly by galvanic action. If grease can somehow migrate into the tiniest of fissures, or diffuse through a thick layer of resin and expand carbon fibers which have been compacted ever-so-tightly, wouldn't grease make a great penetrating oil (it doesn't)?
Finish Line's Fiber Grip is great for non-moving parts, but obviously you don't want that stuff near your bearings. I say grease away.
Also, I recently talked to Trek's Tech Dept. about greasing Madone BBs and they said the PTFE grease we use was just fine.
The problem is so much of the "evidence" I can find of issues with carbon and grease seems anecdotal. If there is any validity to carbon expanding with certain types of grease, it would seem to be less of a problem than when steel bearing shells and aluminum clamps used with carbon get corroded terribly by galvanic action. If grease can somehow migrate into the tiniest of fissures, or diffuse through a thick layer of resin and expand carbon fibers which have been compacted ever-so-tightly, wouldn't grease make a great penetrating oil (it doesn't)?
Finish Line's Fiber Grip is great for non-moving parts, but obviously you don't want that stuff near your bearings. I say grease away.
04-29-13 | 09:37 AM
#22
Senior Member
Joined: Apr 2013
Posts: 260
Likes: 0
From: North Attleboro, MA
Bikes: Surly Steamroller
Hunh?
Below is taken from this thread -https://forums.roadbikereview.com/com...sts-40455.html
From Easton:
No grease on carbon posts. Grease contains certain minerals that can attack clear coats, can penetrate the resin matrix and could cause swelling of the composite laminate. Can you say "stuck seat post?" Don't use grease.
John G. Harrington
Vice president, bicycle products
Easton Sports, Inc.
From Campagnolo:
No grease. In some cases it can be dangerous to use grease as the chemical composition can cause a reaction between materials. Besides, it increases the torque required to clamp the post.
Richard Storino
Campagnolo USA
From Deda:
Absolutely no grease on carbon, ever. Also, do not use solvents to get old grease off, or to get old grease out of the seat tube. John Harrington of Easton and I believe that many solvent residues in the seat tube soften the gel coat of the carbon, then bond the gel coat to the inside of the seat tube, freezing the seat post in position for eternity.
Tom Franges
Deda Elementi North America tech support
From Bontrager:
There are some petroleum greases that are slightly acidic. That acidity can attack the resin used in carbon-fiber construction (frames or posts). This same acidity can attack aluminum or steel frames components, too. However, most greases are engineered to be slightly basic. Neither Trek's nor Bontrager's carbon resin is affected by this acidity. The main reason we suggest you don't use grease on any seatpost inserted into a Trek OCLV frame is that there is not enough surface roughness inside the seat tube to ensure your post stays where you put it.
Scott Daubert
Trek team liaison
No grease on carbon posts. Grease contains certain minerals that can attack clear coats, can penetrate the resin matrix and could cause swelling of the composite laminate. Can you say "stuck seat post?" Don't use grease.
John G. Harrington
Vice president, bicycle products
Easton Sports, Inc.
From Campagnolo:
No grease. In some cases it can be dangerous to use grease as the chemical composition can cause a reaction between materials. Besides, it increases the torque required to clamp the post.
Richard Storino
Campagnolo USA
From Deda:
Absolutely no grease on carbon, ever. Also, do not use solvents to get old grease off, or to get old grease out of the seat tube. John Harrington of Easton and I believe that many solvent residues in the seat tube soften the gel coat of the carbon, then bond the gel coat to the inside of the seat tube, freezing the seat post in position for eternity.
Tom Franges
Deda Elementi North America tech support
From Bontrager:
There are some petroleum greases that are slightly acidic. That acidity can attack the resin used in carbon-fiber construction (frames or posts). This same acidity can attack aluminum or steel frames components, too. However, most greases are engineered to be slightly basic. Neither Trek's nor Bontrager's carbon resin is affected by this acidity. The main reason we suggest you don't use grease on any seatpost inserted into a Trek OCLV frame is that there is not enough surface roughness inside the seat tube to ensure your post stays where you put it.
Scott Daubert
Trek team liaison
04-29-13 | 09:43 AM
#23
Your cog is slipping.
Joined: May 2009
Posts: 26,053
Likes: 100
From: Beverly MA
Bikes: EAI Bareknuckle
Oh, man. There is so much conflicting information on the internet about grease and carbon fiber. Here is an article where both Lennard Zinn and Craig Calfee both recommend greasing carbon: https://velonews.competitor.com/2005/...ed-carbon_9023
Also, I recently talked to Trek's Tech Dept. about greasing Madone BBs and they said the PTFE grease we use was just fine.
The problem is so much of the "evidence" I can find of issues with carbon and grease seems anecdotal. If there is any validity to carbon expanding with certain types of grease, it would seem to be less of a problem than when steel bearing shells and aluminum clamps used with carbon get corroded terribly by galvanic action. If grease can somehow migrate into the tiniest of fissures, or diffuse through a thick layer of resin and expand carbon fibers which have been compacted ever-so-tightly, wouldn't grease make a great penetrating oil (it doesn't)?
Finish Line's Fiber Grip is great for non-moving parts, but obviously you don't want that stuff near your bearings. I say grease away.
Also, I recently talked to Trek's Tech Dept. about greasing Madone BBs and they said the PTFE grease we use was just fine.
The problem is so much of the "evidence" I can find of issues with carbon and grease seems anecdotal. If there is any validity to carbon expanding with certain types of grease, it would seem to be less of a problem than when steel bearing shells and aluminum clamps used with carbon get corroded terribly by galvanic action. If grease can somehow migrate into the tiniest of fissures, or diffuse through a thick layer of resin and expand carbon fibers which have been compacted ever-so-tightly, wouldn't grease make a great penetrating oil (it doesn't)?
Finish Line's Fiber Grip is great for non-moving parts, but obviously you don't want that stuff near your bearings. I say grease away.
