Advertise on Bikeforums.net



User Tag List

Results 1 to 5 of 5
  1. #1
    Senior Member
    Join Date
    Jun 2010
    Location
    Arlington, MA, USA
    My Bikes
    1981 Panasonic DX-2000, 1986 Cannondale SR500, 1991 Specialized Crossroads
    Posts
    123
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    old style seat post binder bolt -- how to measure for replacement?

    Had my frame re-finished, and now I can't stand to put the old parts back on. Have replaced most everything, and am down to the above piece. The bolt head has a small protrusion that fits into a small slot in one of the ears, thus allowing the nut to turn without holding the bolt head with a wrench. It would appear that these come in at least a couple of different sizes. I've measured the outside dimension (outside of ear to outside of ear) and that comes up as 23mm. Did I get the right measurement? Good source for these? (cheap shipped).

  2. #2
    Senior Member
    Join Date
    Jul 2006
    Location
    beantown
    My Bikes
    '89 Specialized Hardrock Fixed Gear Commuter; 1984? Dawes Atlantis
    Posts
    695
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Can you bring the old ones to your lbs to get a match?

  3. #3
    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
    Posts
    20,513
    Mentioned
    45 Post(s)
    Tagged
    1 Thread(s)
    Seat post bolts are measured the same way as all screws and bolts, that is length below the head. If the bolt isn't recessed into the ears than the bolt has to be a few mm shorter than the outside width of the ears, so it has room to pinch them closed before running out of thread.
    FB
    Chain-L site

    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

    “One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

    WARNING, I'm from New York. Thin skinned people should maintain safe distance.

  4. #4
    Senior Member
    Join Date
    Jun 2010
    Location
    Arlington, MA, USA
    My Bikes
    1981 Panasonic DX-2000, 1986 Cannondale SR500, 1991 Specialized Crossroads
    Posts
    123
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks, both. I will check with LBS first.

  5. #5
    Senior Member himespau's Avatar
    Join Date
    Jun 2008
    Location
    Louisville, KY
    Posts
    7,486
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    I got mine (wanted to go non-quick release as I was getting some slippage) at loose screws. Just a thought if your lbs doesn't have any.
    Punctuation is important. It's the difference between "I helped my uncle, Jack, off a horse" and "I helped my uncle Jack off a horse"


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •