old_coyote_pedaller
MacRetro Rider
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Can't you dismantle the dropper insitu? Removing the dropper's moving parts and screwing collar back on would help prevent the dropper becoming unusable. The dropper would just be a hollow tube you could spray plumbers pipe freeze stuff in to it to cool it down quickly then give the collar a sharp tap downwards with tool No1 using a bit of flat wood on top to protect collar. If possible get a spanner/shifter on collar to turn it at same time as if you were trying to tighten it.
I removed a very stuck aluminium post in a steel Holdsworth Special frame by making up a plastic tube that I fed into seat-tube through the BB so that it's end was inside seatpost. To this I attached a CO2 tyre inflater that I blasted in one go, it cooled down the post enough to allow me to twist the whole frame with post gripped in vice. I'd tried all the other methods using WD40/penetrant etc nowt worked. Even had frame upside down in vice and filled the seat-tube/post with a mixture of oil and petrol for a week. No amount of twisting frame resulted in any movement not even any creaking. First hard twist after freezing it resulted in a loud crack which with further twisting, lots of creaking and post was out.
When I looked at post after, the penetrant, oil/petrol mix had barely soaked more than 1/2" on 4 inches of corrosion on post. Post cleaned up and was reused.
I know your frame is not steel so the different expansion/contraction rates of carbon and aluminium might not work the same as steel and aluminium. Although seat-tube is aluminium possibly? A combination of freeze inside and careful quick application of hot water on outside might give it a thermal shock that would help as tool No1 was applied.
I removed a very stuck aluminium post in a steel Holdsworth Special frame by making up a plastic tube that I fed into seat-tube through the BB so that it's end was inside seatpost. To this I attached a CO2 tyre inflater that I blasted in one go, it cooled down the post enough to allow me to twist the whole frame with post gripped in vice. I'd tried all the other methods using WD40/penetrant etc nowt worked. Even had frame upside down in vice and filled the seat-tube/post with a mixture of oil and petrol for a week. No amount of twisting frame resulted in any movement not even any creaking. First hard twist after freezing it resulted in a loud crack which with further twisting, lots of creaking and post was out.
When I looked at post after, the penetrant, oil/petrol mix had barely soaked more than 1/2" on 4 inches of corrosion on post. Post cleaned up and was reused.
I know your frame is not steel so the different expansion/contraction rates of carbon and aluminium might not work the same as steel and aluminium. Although seat-tube is aluminium possibly? A combination of freeze inside and careful quick application of hot water on outside might give it a thermal shock that would help as tool No1 was applied.
