Originally Posted by
dynaryder
So is the issue the insert? As in,the insert wears,the seatpost rocks back-and-forth,and then the frame cracks? Do the inserts not get replaced at intervals?
Originally Dahon likely used a plastic shim. Do cracking problems, from overtightening, they now recommend steel ones. They sell them but DG made his own. I checked their website in the states, and they are out of stock. I do think DG's problem is from over tightening along with the wallowing out and back and all that, but I don't know the exact mechanism.