16" wheel bike. CNC lugs, bonded tubes, single sided swing arm- Mtbr.com
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  1. #1
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    16" wheel bike. CNC lugs, bonded tubes, single sided swing arm

    Just started work on a new bike for my daughter as she has outgrown the balance bike I made her.

    Plan in 16" wheels in a frame with CNC lugs, carbon tubes bonded in, single-sided swing arm with disc brake. The lugs will be done on my 5th axis mill (the spigots on the parts are just so I can hold the billet to do most of the work in one set-up).
    Here's the rough idea:
    16" wheel bike. CNC lugs, bonded tubes, single sided swing arm-idea.jpg

    Managed to get some time on the mill to do the head-tube and seat-tube nearly finished:
    Head tube
    16" wheel bike. CNC lugs, bonded tubes, single sided swing arm-head1.jpg
    Seat tube
    16" wheel bike. CNC lugs, bonded tubes, single sided swing arm-seat1.jpg
    16" wheel bike. CNC lugs, bonded tubes, single sided swing arm-seat2.jpg

    The rear triangle will be bolted on to the front triangle.
    It'll need some working out to get the wheel in the centre etc so going to get the front finished 1st so I can play with the back end but it'll involve a 20mm front disc hub, the wrong way around, with a singlespeed freewheel carrier bolted on to the disc mount tabs.

  2. #2
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    Sweet!
    Nice work.
    You're an old GT fan, aren't you?
    Aluminum lugs mated to carbon tubing.
    16" wheel bike. CNC lugs, bonded tubes, single sided swing arm-img_8666.jpg
    Quote Originally Posted by mileslong View Post
    I passionately remove rocks and corners and other stuff I find too hard to ride.

  3. #3
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    whoa. super rad. excited to see the end product.

    my next project is to do a 16" frame compatible with 20" wheels for my son. He's outgrown his strider as well, but i haven't had the time to sit down and draw things up yet.

    those are some epic lugs.

  4. #4
    pvd
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    Why are the lugs shaped like tubes intersecting?
    Why no serious material removed from the inside?

  5. #5
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    Quote Originally Posted by pvd View Post
    Why are the lugs shaped like tubes intersecting?
    Why no serious material removed from the inside?
    The bores are only roughed out until I decide on the tubing I'll be using. I'll be taking out as much as I can.

  6. #6
    pvd
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    Why are the lugs shaped like tubes intersecting?

  7. #7
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    Quote Originally Posted by pvd View Post
    Why are the lugs shaped like tubes intersecting?
    The seat lug I understand as there will be seat-stay attachment, but the head tube is harder to figure out.

    Eric
    If I don't make an attempt, how will I know if it will work?

  8. #8
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    I would guess it's for the vice/chuck to hold the workpiece.

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