Originally Posted by Joe Loco

Hey good Citta folks

Well - it was a fun ride while it lasted, but sadly - at the end of last year I discovered the (upper extension of the) seat tube had developed a fatigue crack almost entirely around it's circumference:

... but the good news, the fine folks at Roadbikeoutlet who had been selling them on eBay honored their warranty and sent along a replacement frame. So, now I'm working on cooking up Mk. II, with a even more improvements this time around. Unfortunately I just stumbled over this Dahon thread - pretty much the same story!!!

To that end, I'm using an XXXL-long post this time (the 470mm Nitto from Ben's), and now the post reaches to the uppermost white bands on the frame. Also I shortened the extended seat mast by about half, to accomodate solely the (more robust) dual-bolt RANS collar I'd previously used to retain the riser stem (of course, now I will probably break my face, having moved the q/r over to the headset stack...!).

So: check your frame. Maximize the amount of seatpost in your frame. And don't overload!