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  1. #1
    the uncarved block openmindedgent's Avatar
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    Bamboo pannier racks?

    bamboo.JPG

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    eh?

    Anyone ever done anything like this before? I am at a loss for ideas on how to attach the supports to the "outrigger" dropout. There are two screw holes horizontal and about an inch and a half apart. This is on the part that sticks out from the chainstay above the dropout thus being called an "outrigger". I want to make a metal plate with little tubes attached for the bamboo to stick into like a tent post set up.

    diagram.JPG

    Maybe that makes sense?

    Anyway, I will be adding a center support going straight up and down using the hole in the front on the dropout setup. I think this is going to work. I was holding it together and laying all of my weight on it and it seems really really strong. Let me know how you all feel about this.

    I think it looks pretty cool too.

  2. #2
    Professional Fuss-Budget Bacciagalupe's Avatar
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    Uhhhh, right.

    Seriously, I think the only way something like this is likely to work is with lugs. Plus, you have to treat the bamboo or it'll deteriorate when exposed to the elements.

    http://www.calfeedesign.com/bamboo.htm for a little extra info on bamboo frame work.

  3. #3
    Thawing Member Aloyzius's Avatar
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    If it was me. I would ride very slowly, so when it breaks and jams in the spokes I would minimize the chances of killing myself.

    It's a neat idea. But I think you need to spend more time on design and think it through. Fiber and resin is something used quite often in this sort of function. I would research that. It's going to be a hassle if you want to do this right. If not, there's usually one on sale at nashbar.

  4. #4
    GATC
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  5. #5
    Senior Member zonatandem's Avatar
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    Calfee bamboo tandem . . . just add-your-rack!
    Attached Images Attached Images

  6. #6
    Scott n4zou's Avatar
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    I've seen racks made from PVC plumbing pipe that held up for a couple of years. Considering most Bamboo is stronger than steel I see nothing wrong with Bamboo used as rack material.
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  7. #7
    the uncarved block openmindedgent's Avatar
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    Quote Originally Posted by Aloyzius View Post
    If it was me. I would ride very slowly, so when it breaks and jams in the spokes I would minimize the chances of killing myself.

    It's a neat idea. But I think you need to spend more time on design and think it through. Fiber and resin is something used quite often in this sort of function. I would research that. It's going to be a hassle if you want to do this right. If not, there's usually one on sale at nashbar.
    Well I should mention these are surely not going to be my touring racks, I will tweak the desin to get full strength and safety out of these so that I can drape luggage over them to practice riding with weight on my bike. I will chip in the cash for a really nice rack to keep forever when the time comes but I think this is a cool little jerry-rig for now.

    To keep out the elements I am waiting for the bamboo to dry a bit and then I am putting on 5 coats of tung oil (is that legit for bamboo?)

  8. #8
    Thawing Member Aloyzius's Avatar
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    Well, in that case. Yeah, it's a neat idea, have fun.

  9. #9
    Professional Fuss-Budget Bacciagalupe's Avatar
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    Y'know, have fun with the bamboo, but really. Just buy a rack. $25 will get you something more than sufficient to cross the US, assuming you don't have something like absurdly short chainstays.

    I don't know how to cure bamboo properly, you'd better look it up and do some tests.

  10. #10
    jon bon stovie
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    bamboo is usually hollow. have you considered some steel rods going through each section of bamboo?

  11. #11
    Slowpoach
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    Not sure about the best way to do joins, because bamboo is prone to splitting. If you don't have lugs then maybe very accurate shaping of the end of bmboo, with fibreglass/epoxy reinforcement.

    What diameter bamboo would you need for adequate strength? My guess is that it would be wider than pannier clips.

    I guess you could use custom carriers rather than panniers. eg. baskets or broad top to put a backpack onto.

    All the racks and baskets I saw in Vietnam were made of metal.

    If you are really going lightweight as you say, how about a big seat bag and a frame pack?

  12. #12
    Scott n4zou's Avatar
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    Quote Originally Posted by ernok1923 View Post
    bamboo is usually hollow. have you considered some steel rods going through each section of bamboo?
    EMT conduit works very well. Carefully select bamboo that will allow the conduit to slide into the Bamboo or over the outside of the Bamboo. Use epoxy to join the conduit to the bamboo. Before you attach the conduit to the Bamboo flatten one end and drill the required hole to allow bolting it to the braze on. Coat the Bamboo with polyurethane or resin to strengthen it even more and protect it from the weather.
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  13. #13
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    "I think it looks pretty cool too."

    If I was looking for cool, I would probably try something a little more primative like, say bind the joints with rattan, or wire as is done with the furniture or scaffolding; or, I would make the joints coped as they are with normal metal racks and build up some fiberglass tow (aircraft spruce) around them for a low impact structural joint.

    "Considering most Bamboo is stronger than steel I see nothing wrong with Bamboo used as rack material."

    That is misleading, though. While they say that is true, it is true on a weight not volume basis, and it is only true of the power fibers not the other 80% of the wall materials. That is why it is a little more painful trying to break 3/8" 4130 over your knee compared to the average bamboo tomato stake.

    "To keep out the elements I am waiting for the bamboo to dry a bit and then I am putting on 5 coats of tung oil (is that legit for bamboo?)"

    As you probably know you can significantly increase the strength of Bamboo by baking it. Tung oil, though used on boats, does water mark readily. Adding about 1/3 by volume of some kind of spar varnish helps drying, build, and will reduce/eliminate water marking.

    My bamboo fenders were finished with marine epoxy, and strangely enough the results are natural looking and, of course, very waterproof. Not a good finish for high sun zones, though. You would need to topcoat the epoxy with UV varnish for that use.

  14. #14
    the uncarved block openmindedgent's Avatar
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    bamboo5.JPG
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    Ok, here is the semi-final product (bamboo grocery crate rack). I will get real racks when I get more money but for now this has been through a few really good road tests and shows promise. I like that I have my tool belt attached, it makes me feel like I am carrying a home away from home on the back of my bike. It is obviously pretty top heavy which has shown to be an issue so what I will do is attach bags to the sides of the crate to carry things like cans of food and for delicate things like loaves of bread I will use the crate on top. I feel like I can at least use this to practice hauling my gear for day trips and the such. It is currently drying and getting ready for another coat of polyurethane. I was up all night working on this and almost gave up but I feel good about it at this point.

  15. #15
    the uncarved block openmindedgent's Avatar
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    Oh yea, how does everyone like my fender?


    What can I say, it was $0...

  16. #16
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    I like your fenders, great idea. Not sure about the bamboo, I think the rigidity (or lack there of) of the joints might be an issue after a few miles, but I say go for it. Never know until you try. Just hope that if something breaks, it doesn't end up in the spokes. Good luck, and keep us posted on how it works out

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