Step 9: Touching up the Joints

There are almost certainly going to be some pits or ridges in your joints that would be too difficult to sand out.  To fill these imperfections, I made my own epoxy filler out of carbon dust.  When mixed in with epoxy, this forms a black, tar-like glue that can be used like putty to fill in the gaps.  I made the carbon dust by filing down a piece of a burned wood.  I then used a super fine strainer to filter out all but the very smallest particles.  Once you have made the thickened epoxy, spread it generously on any imperfections in the surface.  Once it has dried, sand it down to the level of the carbon fiber.
<p>Where did you get the bamboo poles?</p>
<p>I tried putting one together, not my best work. Then I got a Bambolution bamboo bike, which was one of the best decisions I've ever done. I have already completed 3 full triathlon seasons with my Raptor! Its incredible how bamboo can challenge those guys in their carbon stallions. I know you can get one at stip bike or order direct online. </p>
why did you wrap it up with black tape? and it look like sticky side up
<p>I built mine using a similar method. Really fun to do</p><p><a href="http://www.instructables.com/id/Bamboo-Carbon-Bike/" rel="nofollow">http://www.instructables.com/id/Bamboo-Carbon-Bike/</a></p>
<p>Hi,</p><p>You use hollow bamboo or they are full inside?</p>
<p>I think every bamboo is hollow.</p><p>You just need to punch thorough nodes, so bamboo don't brake during heating.</p>
<p>Thanks for your helpful instructable! I made my own based on your methods. Nice work by the way!</p>
I was wondering how much carbon fiber you ended up using, the length, and what size (1k,3k,6k,12k,etc) thankyou
12K tow, under 1000 m
<p>Hi,</p><p>will tow such as this be OK?:</p><p><a href="http://www.ebay.co.uk/itm/Carbon-Fibre-12K-Tow-100-Metres-Hexcel-IM9-/331300167402?pt=UK_ToysGames_RadioControlled_JN&hash=item4d23075eea" rel="nofollow">http://www.ebay.co.uk/itm/Carbon-Fibre-12K-Tow-100...</a></p><p>If I understood correctly, I would need 10 of these tows to make one bike?</p>
<p>hi there,</p><p>awesome bike and very good instrucatble. Can you give me some more information on the buildup of the dropouts? Is it only carbon fibre tow you used? It seems there is something under the carbon (bamboo?)? I am trying to get more information on connecting the metal pieces to the bamboo but am not quite sure what is the best way to do it..</p><p>Thanks!</p><p>Arnoud</p>
How did you prevent epoxy getting into bottom bracket? or headset when wrapping? <br>Is waxing the thread good and so epoxy won't stick? plastic bag? wax paper? <br> <br>thanks!
I covered the inside of the BB shell in tape. Also, if you remove any epoxy that gets into the threads before it is fully cured and in a soft state, it's really easy to remove.
Hi Ben, great great super great instructable, do u think that this could work for a Mountain bike with full suspension? <br> thanks!
I will try and comment after. Thanks !
I just finished building my own road bike, take a look:<br> <br> <a href="http://www.cameronbrown.ca/blog/2013/01/how-to-build-a-bamboo-bike-part-1-plannin-things-n-fetchin-stuff/" rel="nofollow">http://www.cameronbrown.ca/blog/2013/01/how-to-build-a-bamboo-bike-part-1-plannin-things-n-fetchin-stuff/</a><br> <br> <a href="http://http://www.cameronbrown.ca/blog/2013/01/how-to-build-a-bamboo-bike-part-2-cuttin-things-n-wrapin-it-up/" rel="nofollow">http://www.cameronbrown.ca/blog/2013/01/how-to-build-a-bamboo-bike-part-2-cuttin-things-n-wrapin-it-up/</a>
would it be possible to make some fenders and attach some reflectors to is and some accent LED's under them? i think that would be really cool :D
LEDs can be embedded into epoxy and are fairly waterproof when they are. So, probably. But you're going to fling all kinds of road crude at them, so think about sealants, like a clearcoat over the top of all of it.
For carbon, where should i get it, and how much do i get? I'm having a bit of trouble on this but this looks like a fun project. Also, when riding the frame what cautions do i need to be aware of?
I found mine on ebay, but if you just search for &quot;carbon tow&quot; you should be able to find other sources. I do not know an exact amount, but 1000 m should be more than enough. As far as cautions, I ride it just as I would any other road bike.
Thanks! I had heard that you can't get the bike wet, is that true?
The Epoxy should seal the outside surfaces, but really high humidity for long periods might do bad things for the 'boo. You really don't want it changing shape.
when you say &quot;nodes&quot; is that the little membrane the compartmentalizes the bamboo?
Yes, exactly.
Hi, I'm stuck with the wrapping of the tubes with carbonfiber: what pattern should be used to wrap around the joints? especially the bottom bracket area! I would appreciate any comments about this? Using carbon cloth is nice but at the long run, it takes longer, since you have to do one layer at a time, wrap it, let it dry, sand, etc, etc.
I doubt using cloth would take longer. For the joints to be strong, the direction of the carbon fiber needs to vary (as it does in woven cloth), so that the joint is strong in all directions instead of just one. To get fibers perpendicular to the natural wrapping direction, I cut short strips of tow, lay them along the joint lengthwise, in the direction of the tubes, and then wrapped around the tubes with more fiber. The bottom bracket area is especially difficult to fill by just wrapping around the tubes in an easy wrapping pattern, so you will need to cut shorter strips of carbon tow to lay across these gaps and fill them.
Thanks for your reply, I think I've got it. Great! Seriously, cloth takes longer, you have to carefully cut the patterns, lay each layer, wrapp it, let cure, then same layer on the other side of joint, etc, etc. Check out Brano Meres website and see. But anyway, it's just my opinion. Thanks again and have a great day!!
That frame looks incredible. I was wondering could it be built using carbon fibre cloth instead of tow? What would be the advantages/disadvantages?<br><br>
You could definitely build it with cloth. With cloth, you will be able to use less material to get a strong joint. Also, cloth may be easier to work with, since it covers much more area at a time. The reason I chose tow is because cloth is much more expensive.
I am desperate to do this. I live in the UK and cannot find bamboo poles for love nor money though. If anyone could point me in the right direction I'd be forever indebted....
I'm in the same boat, though I've found a couple of options. eBay has a limited selection, but look at the right time and you may get what you need. also, try this website -&gt; http://www.japangarden.co.uk/Buy-Bamboo-Poles-Twine-c-346.html<br>It's pricey but has a decent selection
i'm sure you'll find some. Either go to the garden shop and buy a plant and wait for a few months, or maybe you'll find some at a fancy asian hotel and maybe they'll let you take a pole or two
The chain seems too short, you may need to add some links.<br>As a rule of thumb the two idle gears of the rear derallieaur should have their axle on a vertical line when you put the bigger crank and the smaller pinion. <br>Compliments for the nice frame!
Total cost?
For the frame:<br><br>Bamboo: Free<br>Donor bike for droputs, bottom bracket, headtube: Free<br>Carbon Fiber: 50$ on Ebay<br>Epoxy: ~50$ + 20$ for dispensers
this is a great looking bike. would the frame be strong enough to make into a bmx ? id love to show it off at the local skate parks lol
I think you could build one strong enough for BMX, as long as you used thick walled tubes and heavily built up the joints. However, I do not think it would do well if the tubes were impacted frequently. In situations were metal tubes would dent, bamboo would more likely crack.
ok then cheers mate. but yeah i wouldnt be doing anything to special. when i get to it and get it done (finding suitable bamboo is hard around my parts) ill definately post pictures<br>
how much does it weigh? it looks relatively light
The frame or the bike? The frame weighs in at about 5 pounds, which is not especially light. If I built another, I could definitely cut at least a pound off the frame.
How much would you charge to make me a bamboo frame?<br>
I've decided that I would not sell frames for a few reasons. First, the amount of time they make means that I would have to charge a lot to make it worth while. Also, if somehow the frame did fail, I would not want to be responsible. If you are interested in buying frames, I would take a look at Boo Bikes and Calfee Design, or Bamboosero for less expensive options.
Very Cool design, fascinating, thank you for sharing.<br>What is the ability for the power to source the LED lights to be generated from the movement of the bike?<br>
You could easily harness enough energy from the movement of the bike to power the LEDs. You could use systems like these:<br><br>http://www.instructables.com/id/Bike-Generator/<br><br>http://www.instructables.com/id/Contactless-dynamo-bike-wheel-lights/<br><br>If you built the coils of a contactless dynamo into the wheel rather than the frame, you would not even need any brushes to conduct the electricity to the spinning wheel.
For the first tacking did you just use epoxy, and did that hold the tubes in place well?
Yes, I used epoxy. It works well, as long as you are not putting much stress on the frame.
where can you get bamboo? I would like to get it free, any ideas?
I cut mine down behind a local park. Chances are there is someone in your neighborhood with a bamboo growth who would happy to let you cut some down.
What kind of bamboo did you use and did you buy it locally or off a website?
I cut down the bamboo locally, so I did not have to pay for it.

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