I’ve bent two aluminum seat posts racing cyclocross. The first was a Zipp Service Course aluminum post and the second was some no name post I had laying around. I’m running posts that are around 330mm in length and have at least 100mm of post inside the bike. Which generally equates to the minimum insertion point being 50mm or 2" below the seat post collar. So plenty of post in bike.
I’m looking at the Thomson Elite 27.2mm posts as those seem to be highly regarded and I’m running one of their X4 stems.
Any other contenders I should look at? Perhaps carbon would offer more rebound should I accidentally remount too hard.