Join Date: Aug 2007
Location: Suncoast, Florida
Bikes: BF Tikit, Dahon Speed TR, Mezzo I4, Miyata 610,Dahon Espresso, Ciao i8, Helios XL I7, many older Dahons and Raleigh Twenty re-builds.
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Last month the wife and I were on our favorite trail for an after work ride. Coming around a corner we came upon two downed bicyclists. Long story short, the lead rider's carbon seat post had failed causing him to crash himself and his friend. The worse of the two was the guy in the rear who landed on his shoulder. (maybe broken). We called and waited for an ambulance and their spouses then left. I did see the seat post, it failed at the clamp bolt. While waiting myself and the lead cyclist looked around and found the bolt and bits. I don't know what he planned to do with it.
I have no solution for your question, but obviously be careful not to compromise the integrity of the part.
(I know that is why you asked, but I just had to share my seat post story)