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  1. #1
    Senior Member
    Join Date
    Oct 2008
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    Is there a method to seatpost size madness?

    Is there a rule of thumb for determining seatpost diameter for frames based on vintage, country of origin, etc? I've seen frames of similar vintage (mid 80s) with different seatpost diameters. Basso - 27.2; Merckx - 27.0; Pinarello - 27.0. I was trying to determine seatpost size for a Torpado frame that is probably of a similar vintage, but the 27.0 seemed too big. Are there any rules that make determining seatpost diameter for frames easier?

    Thanks in advance.

  2. #2
    slow as I ever was Ex Pres's Avatar
    Join Date
    Dec 2007
    an imposter living in the 35223
    10 Post(s)
    0 Thread(s)
    If you know the tubing that can help, but even that's not a guarantee. There's always Sheldon's database, if yours happens to be on the list.
    72 special CNC ______ 72 Frejus (ala Legnano) _73 Holdsworth Record
    74 Italvega NR_______80 Ranson__________ 80 unknown French
    83 Trek 600 (620 styled)___85 Gianni Motta_____ 90 Miele Gara
    02 Casati Dardo #1_____02 Casati Dardo #2 __ 03 Casati Dardo
    08 BF IRO (fixed/SS)___09 Dogma FPX magn_ 10 Vassago Fisticuff (IGH)

    For Sale: _________ 78 Raleigh Professional
    82 Peugeot PXN10___88 Guerciotti GLX

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