I have a Ti 456 frame which I love, but I'm having a few issues with the seatpost. I'm currently using a Thomson 400mm in line one and it creaks, however if I grease it it slips down in the frame regardless of how tightly I do up the QR (a new style hope one).
I tried carbon paste in case that was enough to stop the creaking but not slippy enough to cause the post to slip - but it still creaks. I've also tried a synchros post with similar results. I suspect the seat tube is very fractionally too large for the posts, but not large enough for the next size up post or to fit an additional shim.
Any suggestions as to how I could fix this? I was wondering if I could get a seatpost that was on the fat side of 27.2? Alternatively the frame appears to have a factory fitted shim to reduce the inside diameter of the seat tube to 27.2.... are these generally glued in or just press fit? Can they be replaced?
I don't fancy swapping to a bolt up seat post clamp as I like to be able to drop the saddle easily.
Any suggestions gratefully received.