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  1. #1
    Cannondale Shill hmai18's Avatar
    Join Date
    Apr 2005
    Location
    Kingston, ON, CAN.
    My Bikes
    '06 CAAD8, SRAM Rival/Force and fixie of unknown origin
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    seatpost diamater for Centurion trackie?

    Thanks to the help here, it's been determined that the mystery fixie of mine is a Centurion. Next question is: what's the seatpost diameter?

    I recently bought both a 26.8 and a 26.6 Dura Ace aero post from eBay and neither seems to want to fit. The current post is shimmed and neither the shim nor the post have diameter markings and I don't have access to a caliper.

    So, can anybody tell me what seatpost size I'll need? I'd rather not have to sand down my seat tube or the 26.6 post, nor do I want to go out and buy 26.4, 26.0, 25.8, and 25.0 posts and figure this out by trial and error...

    Train smarter; ride harder; get faster; buy lighter (but not neccessarily in that order)
    2006 Cannondale CAAD8 (SOLD) | 2011 Cannondale CAAD10 | Centurion fixie

  2. #2
    car dodger norskagent's Avatar
    Join Date
    Aug 2005
    Location
    garner/raleigh nc
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    Take it to a bike shop that has a seatpost sizer.
    Or they may have several old posts of different sizes they keep on hand for working on bikes.
    1989 Schwinn Paramount OS
    1980 Mclean/Silk Hope Sport Touring
    1983 Bianchi pista
    1976 Fuji Feather track
    1979 raleigh track
    "I've consulted my sources and I'm pretty sure your derailleur does not exist"

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