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  • Ribble 725 hardtail. With the shim it's 30.9 like stated in the specs, without its 33.0mm which is weird.
    I contacted their customer service and they asked for a photo of the shim wtf.


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    • Ribble_Cycles_HT_725.png
  • I was going to suggest it may be for changing out to a wider post for a dropper but 33 is weird.

  • I think this is fairly common. I guess it makes sense to use bigger diameter tubes in some cases (for stiffness etc) but use a sleeve to keep to normal seatpost sizes.

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