• Posts
  • RSS
  • ◂◂RSS
  • Contact

  • Bike Trailer

    October 28th, 2009
    bikes, trailer, transport  [html]
    I built a trailer to pull behind a bike. There are bulky things that without borrowing a car are tricky to move; this should help:
    The rope is to suspend milk crates so they are below the level of the axles and give a nice low center of gravity. I'm considering using bungee cords instead for some suspension, but I need to think about how to be sure they won't stretch enough to touch the ground. I still need to paint the frame and add brackets to attach bungee cords to for holding the load.

    The frame is made from 2 and a bit 8 foot 2x4s and is 28.5 inches by 34 inches. Glued and screwed together. Asymetrical because the wheels have different widths. The wheels are the oddball 28 inch (635mm) 700B westwood roadster wheels that came with my flying pigeon. For dropouts I used galvanized steel "mending brackets" from home depot with the dropout slot cut with a drill press and hack saw.

    I made two different hitches, one for my bike and one for Julia's. For both the hitch itself is a QI250 quick dissconnect ball joint. I patterned the hitch after the bikes-at-work trailer hitch design. On Julia's bike I used U-bolts to attach it to the frame:
    On my bike I used radiator clamps because the tubing on my frame was bigger than the U-bolts I had and it needed to clear the coaster brake reaction arm:
    Several parts of the trailer are stronger and heavier than they need to be (hitch L-bracket, 2x4s for the frame, big wheels). The towbar arm and hitch ball may be smaller than they should be. Not sure.

    Comment via: facebook

    Recent posts on blogs I like:

    Some reasons to work on productivity and velocity

    A common topic of discussion among my close friends is where the bottlenecks are in our productivity and how we can execute more quickly. This is very different from what I see in my extended social circles, where people commonly say that velocity doesn…

    via Posts on Dan Luu October 15, 2021

    EDT with updating double counts

    I recently got confused thinking about the following case: Calculator bet: I am offered the opportunity to bet on a mathematical statement X to which I initially assign 50% probability (perhaps X = 139926 is a quadratic residue modulo 314159). I have acce…

    via The sideways view October 12, 2021

    Meditations on newborns

    [Content: death.]I wrote most of this a couple of months ago when Nora was a newborn, but the first few months are not that conducive to finishing blog posts. New babies put you into a liminal period, both in your own experience and in how others treat yo…

    via The whole sky October 3, 2021

    more     (via openring)


  • Posts
  • RSS
  • ◂◂RSS
  • Contact