Advertise on Bikeforums.net



User Tag List

Results 1 to 11 of 11

Thread: Halp!

  1. #1
    Warning:Annoying to jerks RaleighSport's Avatar
    Join Date
    Jun 2011
    Location
    STS
    My Bikes
    Leader 725, Centurion Turbo, Raleigh Team Technium, Schwinn Premis, GT Tequesta, Bridgestone CB-2
    Posts
    5,948
    Mentioned
    32 Post(s)
    Tagged
    0 Thread(s)

    Halp!

    Okay I'm getting in over my head here but I've decided to build my own custom frame, I've got almost everything worked out other than the tube for the fork and the bottom bracket. I want to know if I should fabricate, repurpose, or buy new/used? I'm confident I can install them myself but not so confident that these components can be made with hand tools.

  2. #2
    Member
    Join Date
    Oct 2009
    My Bikes
    Winter Bicycles
    Posts
    45
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Head tube and bottom bracket shell? Buy them. You have your hands full without trying to machine a BB shell.
    --
    Eric Estlund
    Winter Bicycles

  3. #3
    Warning:Annoying to jerks RaleighSport's Avatar
    Join Date
    Jun 2011
    Location
    STS
    My Bikes
    Leader 725, Centurion Turbo, Raleigh Team Technium, Schwinn Premis, GT Tequesta, Bridgestone CB-2
    Posts
    5,948
    Mentioned
    32 Post(s)
    Tagged
    0 Thread(s)
    Can anyone tell me if half inch OD carbon tubing is too small? planning on a double frame structure..yeah

  4. #4
    Randomhead
    Join Date
    Aug 2008
    Location
    Happy Valley, Pennsylvania
    Posts
    12,654
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    for what?

  5. #5
    Warning:Annoying to jerks RaleighSport's Avatar
    Join Date
    Jun 2011
    Location
    STS
    My Bikes
    Leader 725, Centurion Turbo, Raleigh Team Technium, Schwinn Premis, GT Tequesta, Bridgestone CB-2
    Posts
    5,948
    Mentioned
    32 Post(s)
    Tagged
    0 Thread(s)
    using as my actual frame tubes, I saw an old KHS and I really liked the style

  6. #6
    Randomhead
    Join Date
    Aug 2008
    Location
    Happy Valley, Pennsylvania
    Posts
    12,654
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    so you are running two top tubes side by side (like the Trek Earl just as the first example that came to mind)? Half inch should be good for that.

  7. #7
    Warning:Annoying to jerks RaleighSport's Avatar
    Join Date
    Jun 2011
    Location
    STS
    My Bikes
    Leader 725, Centurion Turbo, Raleigh Team Technium, Schwinn Premis, GT Tequesta, Bridgestone CB-2
    Posts
    5,948
    Mentioned
    32 Post(s)
    Tagged
    0 Thread(s)
    yes, and then the same for the bottom bracket to the head tube.. and then 1 tube for each seat stay and 1 tube for each side of the rear fork, I'm thinking of using the tubes then custom wrapping the joints in carbon fiber fabric to join them rather than going with the scotch weld bonding route... I will how ever be using that or something else to bond the bottom bracket headtube and seattube though. So does this sound viable? No kit not nothing.. home made frame jig to duplicated this frame I have.

  8. #8
    Randomhead
    Join Date
    Aug 2008
    Location
    Happy Valley, Pennsylvania
    Posts
    12,654
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I can't comment on your proposed joining method, but I'm not sure you're going to be happy with the down tube being two 1/2" tubes. To get similar stiffness to a normal down tube you'd have to go larger.

  9. #9
    Warning:Annoying to jerks RaleighSport's Avatar
    Join Date
    Jun 2011
    Location
    STS
    My Bikes
    Leader 725, Centurion Turbo, Raleigh Team Technium, Schwinn Premis, GT Tequesta, Bridgestone CB-2
    Posts
    5,948
    Mentioned
    32 Post(s)
    Tagged
    0 Thread(s)
    how much larger would you say? ideally I want this bike frame to be built all from the same size tubing...

  10. #10
    Warning:Annoying to jerks RaleighSport's Avatar
    Join Date
    Jun 2011
    Location
    STS
    My Bikes
    Leader 725, Centurion Turbo, Raleigh Team Technium, Schwinn Premis, GT Tequesta, Bridgestone CB-2
    Posts
    5,948
    Mentioned
    32 Post(s)
    Tagged
    0 Thread(s)
    okay terrible idea I know... but what if I did the downtube as bamboo reinforced with 1 or 2 oh 1/2 inch tubes internally and insulated with rigid foam?

  11. #11
    Senior Member
    Join Date
    Oct 2009
    Location
    England, currently dividing my time between university in Guildford and home just outside Reading
    My Bikes
    Too many to list here!
    Posts
    1,890
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Or what if you did the downtube as just bamboo? Plenty of people build bamboo bikes, several of them post on here, but you'd definitely have to go for more than 1/2" bamboo pieces for stiffness.

Posting Permissions

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