Advertise on Bikeforums.net



User Tag List

Results 1 to 7 of 7
  1. #1
    Junior Member
    Join Date
    Sep 2010
    Posts
    6
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Seatpost + Bottle mount dilemma

    Due to smaller frame size, my seatpost is stopped by the top insert of the bottle mount and not going further down. My Thudbuster just came in today and it's even longer

    How do I go about removing the threaded insert from the frame? It looks like it's been stamped/pressed on both sides, like a rivet. Thanks.

    mount2.jpg
    mount1.jpg

    With the seatpost off and looking down the tube, I see this:
    mountin.jpg

  2. #2
    Quirky Grifter LesterOfPuppets's Avatar
    Join Date
    Sep 2008
    Location
    Vancouver, USA
    My Bikes
    My War
    Posts
    21,687
    Mentioned
    68 Post(s)
    Tagged
    9 Thread(s)
    I'd cut the seatpost to fit. Leave it as long as possible. Measure thrice, cut once.
    1980ish Free Spirit Sunbird fixed * 1996 Mongoose IBOC Zero-G * 1997 KHS Comp * 1990-ish Scapin * Lemond Buenos Aires Triple

  3. #3
    Junior Member
    Join Date
    Sep 2010
    Posts
    6
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yeah, I thought about pulling out the hacksaw but I want to know my options. My first precious add-on and I have to chop it up. Lol

  4. #4
    Randomhead
    Join Date
    Aug 2008
    Location
    Happy Valley, Pennsylvania
    Posts
    12,826
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    you didn't say what kind of frame it is. Many frames have pressed in inserts and you might as well remove them if you can't live with the part inside the frame. If it's steel, it probably will work without the inside part.

    I have cut down a seatpost on my lathe, I see no reason to have a seatpost that is that long down inside a frame just waiting to get stuck.

  5. #5
    Junior Member
    Join Date
    Sep 2010
    Posts
    6
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    It's an aluminum frame. I got it removed now by hammering in an Allen wrench and pop it off.

  6. #6
    Junior Member leftnose's Avatar
    Join Date
    May 2011
    Posts
    23
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Sounds like your issue is resolved?

    The item in second pic in your first post is called a rivnut and the best way to remove them is using a drill bit the same size as the hole in which the rivnut is secured. Drill deep enough that the head of the rivnut comes off and then push the remaing bit back into the hole. Turn your bike upside down to get it out of the seat tube.

  7. #7
    coprolite fietsbob's Avatar
    Join Date
    Jun 2010
    Location
    NW,Oregon Coast
    My Bikes
    7
    Posts
    3,088
    Mentioned
    44 Post(s)
    Tagged
    0 Thread(s)
    FWIW , different in that its steel, Bike Friday adds the waterbottle brazeons
    to the surface , behind the seat tube, uses a different piece,
    the external is the hourglass piece, that often gets used for rack mounts,
    brazed to the side of tubes,
    but to the desired effect,
    no interference in the seat post coming down.

Posting Permissions

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