The C50 uses a 28.0 mm seat post. That's an uncommon size. Are you using the right size? If your seat post diameter is too small, that could explain the slipping -- and if that's the case I think there are spacer sleeves you can buy to take care of the problem.rmill said:undefinedundefinedundefined
I am having a problem with my colnago seatpost slipping down on my c50 HM. Anything I can do?