Hi all!
Before you get into any drastic measures, try using Plusgas! I had previously used a bike stand and about 25 minutes of levering the whole bike unsuccessfully. I sprayed plusgas in around the seatpost, let it soak in for an hour, then turned the bike upside down and sprayed it in the seat tube mounting holes and left it for an hour. It then came unstuck by hand.
I still have half a can if anyone in S London wants to try it
It's just a penetrating oil, can work for either. If it's an aluminium post properly fused into a steel frame you may end up resorting to caustic soda though
Hi all!
Before you get into any drastic measures, try using Plusgas! I had previously used a bike stand and about 25 minutes of levering the whole bike unsuccessfully. I sprayed plusgas in around the seatpost, let it soak in for an hour, then turned the bike upside down and sprayed it in the seat tube mounting holes and left it for an hour. It then came unstuck by hand.
I still have half a can if anyone in S London wants to try it