I have an frame with a loose seatpost, i.e. there is around 1mm of slop when the clamp is loosened.
If I apply a thin coating of carbon grip and tighten the clamp to 9Nm (as stamped), the seat post still slips when I go over bumps.
Right now I apply a liberal heaping of carbon grip to both the seat post and the seat tube, then I do up the clamp. When I put weight on it I get a bit of squeeze out since there's so much carbon paste. What I do now is that I'll jump the bike to slam my body weight on the saddle and get all the excess to squeeze out, and then re-torque it. Will repeat this 2-3 times until no more squeeze out and it works like a charm.
When I remove the seatpost there is a 1mm thick layer of basically sand with a bit of gel (but it's quite dry, probably since all the "gel" was squeezed out).
Anyone try shimming or something else?
