Originally Posted by kb5ql
They're both 34mm seatposts. The only difference was that the Swift's was heavier and just a touch thicker (on the inside portion of the tubing). Contractually they're bound to say don't use another seatpost. I'd like to know if the Dahon one is completely taboo...
I tried the seatpost off my Dahon Vitesse, and I couldn't get the post clamped-in tight enough to prevent it from turning/sinking in the seat tube, so I'm inclined to think that there is some variation in diameter.