Originally Posted by
CliffordK
The one comment is that there may be a benefit of filing down the damaged part of the frame so it is smooth. That will help prevent a place for cracks to nucleate.
If it's filed or ground smooth, then there's less to keep the seat from rotating. I haven't seen any crack propagation on my frame, but the mating surfaces at the fracture have sort of hammered each other down so there aren't any sharp spots. In any case, there's not as much of a "lever arm" left on the seat tube, and the amount of metal there is massive.
Originally Posted by
CliffordK
The OP still has an issue with the seatpost being unstable in the hole which should be addressed. Undersized seatpost? Find a larger seatpost?
Yeah, this is a bit of an annoyance. The folder has a sleeve shim inside the seat tube which to an extent minimizes the looseness of the seatpost. There is some rotation when I'm pedalling, but it's tolerable.