Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take part in the November Giveaway for Haven Bay beach cruiser and Kazam Link kids trailer valued at $525 💙

Stuck saddle post
Hi i have a problem with my saddle post, as it is stuck wont come up wont go down, any idears how to free it.

This is one of the worst things that can get stuck, it is even "more fun" than a thread on freewheel that won't come off. My suggestion would be to follow:<br />
good luck, you need it.

This is truly the most powerful product I have ever found for metals that seize to each other:
Most of the time my response is, "So, you needed a new frame anyway right?"

Just kidding. It is possibly the hardest thing to get unstuck.

I usually skip steps 1 and 2, involving trying to turn with the saddle attached (Which can bend the rails), using a pipe wrench with rubber padding (Which can deform the post), and go straight to 3.

I wrap the post in a cold compress, for about 25 minutes, or as long as the compress will stay cold, and then get the CO2 cartridge and blast it. The entire cartridge. And usually that's enough to shrink the metal to the point you can take it out.

I usually go to a kitchen supply store or a paintball shop to get the cartridges. But since this is likely the only time you'll be doing this, just buy a couple from the LBS.
Dedicated scholar of bicycles
You have a picture of your bike you can put here in the forum? Or list the make model?
Good maintenance to your Bike, can make it like the wheels are, true and smooth!
I have to search the archives of the frame builder mailing list, there was a discussion some days ago, I think I remember that the solution was (for steel "welded" to aluminum) applying ammonia to it. It will dissolve the aluminum but not touch the steel.
The ammonia trick works, but only if there is sufficient space between the seat post and the frame. if its REALLY corroded and stuck in there, there may not be room for the ammonia to do its thing.

That, and the ammonia you buy at the hardware store is an aqueous solution, since ammonia boils at -28 Fahrenheit, and the oxidation of the aluminum releases hydrogen, and if the OP smokes, this might not be a great idea in the basement.

From what I understand, quite a lot of hydrogen is given off, and it's not like you can smell it, its colorless and odorless, so you would be looking at a situation where a well ventilated area is required.

My two cents? Sacrifice the seat post and squish it in a bench vise, then turn the frame ever so slowly back and forth to release it. Seat posts are cheaper than frames. Well, some are.Big Grin
Dedicated scholar of bicycles
With everything said above I am wandering what kind of Bike it is because of the type of frame. If it is a lower end MTB frame then there is bottom access which would help immensely. Could do a combination of the ammonia or pbblaster (depending on the metal make-up), hair dryer and CO2, then quickly yank like hell method! That don't work vise time!
Good maintenance to your Bike, can make it like the wheels are, true and smooth!
I've never heard of the ammonia method before. Good to know!

Possibly Related Threads...
Last Post
06-04-2017, 04:16 PM
Last Post: Eugbug
02-06-2016, 07:17 PM
Last Post: Lighttower
02-25-2013, 09:47 PM
Last Post: erikbear
04-01-2011, 09:41 PM
Last Post: RobAR
10-11-2010, 12:28 PM
Last Post: Jordan300

Forum Jump:

10 Latest Posts
Is it cold where you are now?
Today 01:53 AM
bike riding is a fun! isn't it ???
Yesterday 07:22 PM
Where do you put your phone when riding?
Yesterday 12:12 PM
Where to travel on a bike Bucket List.
12-05-2022 09:24 PM
Delta Michelangelo bike stand is ideal f...
12-05-2022 07:48 PM
Cannot get tire off wheel
12-05-2022 07:25 PM
Dura Ace large chain ring lateral failur...
12-05-2022 07:19 PM
Hey I’m new to bike ride
12-05-2022 07:09 PM
Don't buy plastic cranks
12-05-2022 06:23 PM
Where are you from and What is your favo...
12-05-2022 09:51 AM

Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

Top 5 Posters This Month
no avatar 1. ReapThaWhirlwind
28 posts
no avatar 2. Painkiller
19 posts
no avatar 3. ichitan
16 posts
no avatar 4. Talha
13 posts
no avatar 5. IgorCvetkovski
13 posts