The Seatpost Man

[gtturbo]

I've done a couple now with pipe freezing kits, just done one literally an hour ago. On this occasion it was a fairly nice post, Suntour XC, so I didnt want to mark it any more than someone had previously done when trying to removing it so the vice was out of bounds this time. So I froze the post, gave it 5 mins, in which time I removed the saddle, and then a few steady whacks with a hammer had it moving downwards. Then once it's moving your pretty much home free bar a couple more minutes cursing as you try to hold the bike and wrestle the post up and out. I obvious put the saddle back on by this time to wrangle it out.

 

[doctor-bond]

Excellent. I’m almost tempted to buy a junker to have a go.

“Great bike you have for sale: quick question - can I just check that the seatpost is properly stuck? Ta.”

 

[Synthiaks]

@gtturbo & @marc two tone which spray did you use?..theres a few on the market but none of the reviews are great!.....I was going to try Artic Hayes? Also did you use an insulated jacket or the sponge/wrap technique?

 

[gtturbo]

I'm a tight arse so found the cheapest option was,

Freeze spray from Wickes - https://www.wickes.co.uk/Wickes-Pipe-Freezing-Spray---240g/p/424922

And Toolstation are knocking out the jackets cheap - https://www.toolstation.com/freezing-jacket/p69262

Then jacket round the post and freeze the bugger. If you are not worried about the post then a vice will definitely be beneficial. As mentioned I wanted to save the post so instead managed to hit it downwards to break the corrosion. Just to add I've also used the freeze method when an American Classic ali post got stuck in my Merlin Ti. I wasn't best pleased when I discovered that but the freeze method sorted it no problem.

 

[marc two tone]

I dont recall the brand of spray, but arctic..something comes to memory.

Use a car wash sponge. Tear it down the middle and open like a pita bread, but keep some kind of intact, like a pita bread.
Wrap local to seatpost stuck section and use 3 or 4 zip ties to hold in place. The load the sponge with your spray, carefully and thoroughly, move around the whole sponge. Then give it 5 mins, atleast, before commencing the rest.
Cheers dude.

 

[Synthiaks]

I dont recall the brand of spray, but arctic..something comes to memory.

Use a car wash sponge. Tear it down the middle and open like a pita bread, but keep some kind of intact, like a pita bread.
Wrap local to seatpost stuck section and use 3 or 4 zip ties to hold in place. The load the sponge with your spray, carefully and thoroughly, move around the whole sponge. Then give it 5 mins, atleast, before commencing the rest.
Cheers dude.

Thanks both...i want to save the seatpost as its a rare one...

I dont recall the brand of spray, but arctic..something comes to memory.

Use a car wash sponge. Tear it down the middle and open like a pita bread, but keep some kind of intact, like a pita bread.
Wrap local to seatpost stuck section and use 3 or 4 zip ties to hold in place. The load the sponge with your spray, carefully and thoroughly, move around the whole sponge. Then give it 5 mins, atleast, before commencing the rest.
Cheers dude.

Thanks..... I'll try the Wickes or Artic Hayes and see how it goes.
The post I want to save is rammed right down into the frame so getting it in any further to break the seal might be difficult..... anyhow, worth a try! Ill test it on another less valuable post in another bike for a bit of practice.

 

[Tootyred]

Liquid nitrogen is available for about £2 per litre from boc, but you do need a container of your own to put it in.

So my welding gas catalogue says......

 

[Antstark]

No one has mentioned the ammonia/oil mix method? Ammonia will gently dissolve the aluminium oxide/corrosion on the stuck post without damaging the frame …takes a couple of days but I have removed loads like this…..one thing though…it stinks! so suggest you do it outside

 

[Synthiaks]

What kind of ratio oil (penetrating?) /ammonia have you used...and succuss on seriously stuck posts?

 

[Antstark]

About 1:50 I guess. I am not sure what constitutes seriously stuck..but it’s worked on all the ones I have ever come across. All of them couldn’t be moved with brute force