Mountain Biking - Stuck Seatpost
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I have aquired a nice custon made steel bike (Chas Roberts white spider) which is in good nick except for the fact that the aluminiun seat post has corroded into the frame.
Do any of you folks have any ideas on how best to unstick it? I have tried liberal use of wd40 but to no avail.
08-29-03, 07:08 AM
Some people have had results with Coca-cola.
Use KROIL instead of the WD40. I'd sugges apply it and
let it soak for a few days, then try.
Also you could heat the seatpost, and then let it cool thus
using expansion/contraction to break the galvanic effect
of the corrosion.
08-29-03, 07:45 AM
If what Lotek fails, I suggest a big Vice-Grip, a couple of strong buddies and a lot of twisting motion.
We had a tri-bike in the shop that had a corroded post in it. Primarily due to the swim (in salt h20) and then the bike portion, and the guy NEVER washed off his bike. We soaked it with PB Blaster for days, to no avail. Finally, we cut the seatpost off about 2" above where it came out of the frame. We then took a hacksaw blad and made a verticle cut on one side of the inside of the post. This cut was made full length, and it was done VERY carefully as to not damage the frame. Once the cut was made, we grabbed on side with some vice-grips and curled it inside the other.
This is a last resort method and a real PITA.
When working on a stuck seatpost, and can't get it out, i resort to my trsuty vice. You stick the seatpost in a vice and twist the frame. You have to be careful though to not screw up the frame. It would be best to take it to a bike shop and have them do it, as they would most likely have experience.
yep. i once cut a post out of a frame by using JUST the hack saw blade and cutting a vertical slice in the post. it was a steel post by the way, and took HOURS to complete.
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