Ritchey WCS 1Bolt design seatpost. 3D forged 7075-alloy, 31.6/ 25mm setback. The post was used only a few times, I change it for a dropper post. The part that is exposed looks brand new, only signs of usage on the part that is inserted.
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Here is a link to a review from VeloNews: https://www.velonews.com/2009/10/news/wrenched-and-ridden-ritchey-wcs-alloy-1-bolt-seatpost-and-streem-saddles_99310
Asking $22 or best offer.