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yetidamo
@deleted
OD of the seat tube will be 31.9mm if I remember correctly.
Also, if I’m not mistaken you can just trim off the entire upper part of the ISP, drill and slot it, and use a standard 27.2 seatpost & clamp as seen on this ISEN (the Talbot ISP bikes were basically the prototypes for the current ISEN ISP bikes, and use the exact same Crossman Composites carbon seat tubes)
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