Unless you do a lot of tweaking with your position, removing a seatpost is something that you might not do too often. If you have tried this on an old bike, you probably know that removing one can be an extreme challenge, especially if it's metal.
While any good mechanic will properly lube a seatpost before it is installed to prevent seizing, there isn't much that can be done after the fact. If the metal expands over time, you've likely got a problem on your hands.
Watch this video from GCN to discover a few tricks to free your stuck seatpost from the frame.
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