Originally Posted by
Campoli
Just curious what causes them to get stuck? I can see it happening with a steel post in a steel frame but how about alloy in a steel frame? This bike had an alloy seat post from the mid 70's that slid out like butter.
I have seen one stuck for mechanical reasons, probably hammered in, and all others were corrosion (aluminum oxide, rusting steel, etc). Aluminum is an active metal and untreated (not greased) will corrode in a New york minute. Your friend is anti-sieze lubricant, apply once and forget about it.