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Porteur Rack

A Porteur conversion rack for the Nitto M12. This is being built by Alistair Spence for my Kogswell P/R. I'm helping with a little of the brazing and we worked together on the design.
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This is the design that I came up with and which we started from.  The green shows a standard Nitto M12.  The red shows the add-on Porteur rack.  <br />
<br />
In the final design we changed to three mounting points instead of four.
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This is the design that I came up with and which we started from. The green shows a standard Nitto M12. The red shows the add-on Porteur rack.

In the final design we changed to three mounting points instead of four.

rackbicyclebrazingporteurnitto m12kogswellcargo bike

  • This is the design that I came up with and which we started from.  The green shows a standard Nitto M12.  The red shows the add-on Porteur rack.  <br />
<br />
In the final design we changed to three mounting points instead of four.
  • Alistair's photo of creating the deck using a tubing bender.
  • The completed deck after bending all four corners.  Photo by Alistair.
  • Untitled photo
  • Aligning the joint for tacking the support piece.
  • Fluxing the joint before tacking.
  • Aligning the joint for tacking the support piece.
  • Alex's first brazing job.  Alistair did the right side of this joint and I did the left.
  • My second brazed joint.  It looks like I overheated the flux.
  • Alistair filed away these areas to fit the tubing which will support the Porteur rack.  The tubing will sit flush with the top of the rack so that it can still be used as a handlebar bag support.
  • The Nitto M12 rack has had spigots added for supporting to the Porteur add-on.  Photo by Alistair.
  • The porteur attachment mounted on top of the base rack.  You can see how the three spigots work.  Photo by Alistair.
  • The rack is almost done.  It still needs a lot of cleanup work, a backstop, and a rear set of stays.
  • This is how the base rack looks naked.  It's a stock Nitto M12 with three rings for supporting the Porteur rack.  It'll still function well as a handlebar bag rack.
  • Base rack plus porteur rack from the side.  There will be another set of stays from the rear corners of the Porteur rack going down towards the dropouts.
  • Closeup of the connection between the porteur rack and base rack.  <br />
Alistair said that it was a lot of work to get these properly aligned.  The clearances between the spigots and sleeves are minimal (necessary to keep the porteur rack from moving around).  <br />
<br />
The spigots extend a little bit so that we can thread them for wingnuts if necessary.  Right now it looks like the two bolts at the dropouts will be enough to properly secure it.
  • One of my (Alex's) brazes.  I probably got the metal a little too hot, so the brass wandered.  It'll take a bit of cleanup work.
  • Another one of my brazes, this one is a lot cleaner and shouldn't require much cleanup.
  • Another view of the rack.
  • The first load on the trial run with the new rack.  Just a small collection of stuff from the farmers market.  The loaded basket probably weighed about 10-15 pounds.<br />
<br />
The bike and rack handled perfectly.  There was no noise or motion in the rack when loaded or unloaded and it seems very stout.
  • photos.alexwetmore.org

    on September 25, 2007

    Most of the tubing is 3/8 x 0.028". The front two "legs" are 3/8" x 0.035". It is all 4130 from Aircraft Spruce

  • photos.alexwetmore.org

    on July 15, 2007

    Alistair Spence (alspence67 at hotmail dot com) is who built this one for me. I know that he has made a second one. It isn't a cheap project though, there is a lot of hand work.

  • Chad

    on July 15, 2007

    Oh I see! As for who is building it.... Well, The guy who agreed to do it for me, it seems has lost interest. Any suggestions?

  • photos.alexwetmore.org

    on July 8, 2007

    It is held at the dropouts. Look at the photos of the final rack and I think it is more clear. It's a very secure setup.

    Who is making one for you?

  • Guest

    on July 8, 2007

    I love this! One quesion: I get that the pins keep the rack in position, but what secures it down? I'm having a rack like this made, but the framebuilder can't figure it out.

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