Seatpost Size Question

Printable View

  • 10-17-2012
    TopQuark
    Seatpost Size Question
    From this picture, is my Seven seatpost size 27.2mm or 28.6mm? I measured the inside diameter of the seat tube and I am getting ~27.9mm with the tip of the tube already bent.

    https://imageshack.us/a/img191/6793/dsc9871o.jpg

    How do you compare it with your seat tube? It is tightened the same way? What seatpost size will you recommend?

    I got my Seven used.
  • 10-18-2012
    mcteague
    Should be 27.2mm. They have a composite sleeve inserted in the seat tube to prevent seizing.

    Tim
  • 10-18-2012
    TopQuark
    Thank you!
  • 10-20-2012
    ijuf
    Yes, it should be 27.2mm seatpost. I have the same sleeve and screw and everything. But my seatpost keeps sliding inside the seat tube. I've tightened it very hard. I asked my LBS about it and he said I need carbon paste which has fine grit in it to provide friction between two carbon surfaces.