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  1. #1
    Newbie
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    Nov 2011
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    Seatpost diameter next mountain bike

    Im trying to find an extended seatpost for my next bike, but i cant find the correct width. I dont have a metric tape measure.

  2. #2
    Senior Member
    Join Date
    Aug 2007
    Location
    NorCal
    My Bikes
    2009 Surly Cross Check Frankenbike
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    Bike shops will measure it for you with a caliper.

  3. #3
    Senior Member
    Join Date
    Aug 2005
    Location
    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
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    Look at the old seatpost. Most have the diameter marked on them below the minimum insertion line.

  4. #4
    Senior Member
    Join Date
    Apr 2009
    Location
    New Rochelle, NY
    My Bikes
    too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
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    If you come back and post the brand and model bike, someone with the same bike might tell you the seat post diameter.
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    An ounce of diagnosis is worth a pound of cure.

    “Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

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