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  1. #1
    Über Member Ryleeryno's Avatar
    Join Date
    Jan 2006
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    Massachusetts
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    2005 Trek 5000 (the last OCLV)
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    Trek 5000 OCLV Seatpost Collar size

    I need to replace the seatpost collar on my 2005 Trek 5000 and can't figure out what size the replacement should be. Does it go by inlet diameter (27.7mm) or Outlet diameter?

    Thanks.

  2. #2
    Senior Member
    Join Date
    Aug 2005
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    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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    The collar is sized by the outside diameter of the seat tube. Typically, there are three sizes available; 28.6 mm (1-1/8"), 31.8 mm (1-1/4") and 34.9 mm (1-3/8"). The 34.9 mm is sometimes listed as 35 mm.

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