how to build a bamboo bicycle

8/18/2019 How to Build a Bamboo Bicycle

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I saw a picture of a bamboo bike and decided I had to have one. I found out that

professionally built bamboo frames cost a few thousand dollars so I decided to

build one myself.

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I had a lot of fun and I hope that you can make one too by following these

instructions.

The bike I made is a track bike for commuting to work. The bicycle was inspired

by Craig Calfee who makes much nicer bamboo bikes. I really wanted

something with a minimum of fancy technology and carbon fiber (although I

sprang for the carbon fork). I used epoxy and hemp fibers on all the joints (no

pun intended). The track bike also makes it easy in that it is a very simple bike -

no gears, cable routings, rear brake or derailers.

Disclaimer: Death or serious injury can result from a bicycle frame failure. Using

new and untested techniques is risky. Be smart.

Some links to check out before you get started:

Brano's instructable on carbon and bamboo bike building

(http://www.instructables.com/id/How-I-built-a-carbon-bike-frame-at-home-and-

a-bam/)

Craig Calfee's bamboo bike project (http://www.bamboobike.org/Home.html)

Calfee bamboo bikes (http://www.calfeedesign.com/bamboo.htm)

Bike Forest BikeCAD (http://www.bikeforest.com/CAD/index.php)

The forum for info on bamboo and heat treating it (http://www.bamboocraft.net/)

The basic steps:

1. Figure out what type of bicycle you want2. Get all of the parts and bamboo

3. Heat treat the bamboo

4. Tack it all together

6. Epoxy it all together

7. Build up bike

8. Ride off into sunset

Step 1: Pick the bicycle frame you want to build

If you are a real bike nerd you will love this step. You are now a frame designer

DIY Bamboo Bike- Try the

New Style of Riding! (/id/DIY-

Bamboo-Bike-Try-the-New-

Style-of-Riding/)

Building a Carbon Fibre

Bamboo Bicycle From

Scratch (/id/Building-a-

Carbon-Fibre-Bamboo-

How I built a carbon bike

frame at home (and a

bamboo frame too) (/id/How-

I-built-a-carbon-bike-frame-

Bamboo Bike #2

(/id/Bamboo-Bike-2/)

by BAMBOOBIKER

(/member/BAMBOOBIKER/)

Bamboo Bike (/id/Bamboo-

Bike-3/)

by NathanaelScheffler

(/member/NathanaelScheffler/)

http://www.instructables.com/member/NathanaelScheffler/http://www.instructables.com/id/Bamboo-Bike-3/http://www.instructables.com/id/Bamboo-Bike-3/http://www.instructables.com/member/BAMBOOBIKER/http://www.instructables.com/id/Bamboo-Bike-2/http://www.instructables.com/id/Bamboo-Bike-2/http://www.instructables.com/id/How-I-built-a-carbon-bike-frame-at-home-and-a-bam/http://www.instructables.com/id/How-I-built-a-carbon-bike-frame-at-home-and-a-bam/http://www.instructables.com/id/Building-a-Carbon-Fibre-Bamboo-Bicycle-From-Scratc/http://www.instructables.com/id/Building-a-Carbon-Fibre-Bamboo-Bicycle-From-Scratc/http://www.instructables.com/member/bikelightsuk/http://www.instructables.com/id/DIY-Bamboo-Bike-Try-the-New-Style-of-Riding/http://www.instructables.com/id/DIY-Bamboo-Bike-Try-the-New-Style-of-Riding/http://www.instructables.com/file/FILF07WFEEMAOKL/http://www.bamboocraft.net/http://www.bikeforest.com/CAD/index.phphttp://www.calfeedesign.com/bamboo.htmhttp://www.bamboobike.org/Home.htmlhttp://www.instructables.com/id/How-I-built-a-carbon-bike-frame-at-home-and-a-bam/


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Reply10 months ago8

Replya year ago

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X

and get to think about things like bottom bracket drop, chain stay length and

head tube angle.

I suggest using an existing frame as a template (if you have one you really like).

If you feel ready to test your skills of an artist go to www.bikeforest.com and use

the BIKECAD program. It is a free, online frame designing program.

Another good source of information is the Paterek Manual, which is actually for

steel frames. Paterek goes into detail on how to size a frame based on body

measurements and what each change in geometry means as far as road

handling goes.

Once you have your geometry picked out draw your frame on a large piece of

paper.

paolobertoncin (/member/paolobertoncin)

great job

bpurcell2 (/member/bpurcell2)

Name 'Not just for smoking' as in , Hemp is;

davidbarcomb (/member/davidbarcomb)

This looks great! I have to try this one

faceboogerz (/member/faceboogerz)

Where did you get all the dropouts joints from?cut out from an

old bike or did you make them or did you order them?

ayasbek (/member/ayasbek) (author) .

faceboogerz (/member/faceboogerz)

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a year ago

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Those dropouts were cut out of an old BMX. Now I get

all my dropouts from these two:

Paragon Machine Works

(www.paragonmachineworks.com)

or

Nova Cycle Supply (http://www.cycle-frames.com)

Hope this helps.

faceboogerz (/member/faceboogerz) . ayasbek (/member/ayasbek)

Thanks yes your thread have been very helpful. ..and thanks for

the two websites.

swimmer321 (/member/swimmer321)

so after you wrap the joints of the bike in the hemp, can you

sand it down to make it look nicer? the calfee bamboo bike

oints are really really nice and clean-looking. How can i get

that look?

chriscook42 (/member/chriscook42) .


Thats what Im wondering. It is almost as if the hemp

and stuff was melted into a single material. But you are

right- it is a much more appealing look.

masseffectcat (/member/masseffectcat) .

chriscook42 (/member/chriscook42)

It's my understanding that, besides being very careful to

wrap the joints as tightly/neatly as possible, Calfee

overbuilds the joints, grinds them down, and does a final

epoxy on the cleaned up surface. The overbuild is

important, because it allows you to improve the

aesthetic without reducing the strength of the joint. Just

don't grind all the way through the overbuilt parts and it

should be fine.

chriscook42 (/member/chriscook42) .


After further analysis it seems calfee probably did

hemp and then fiberglass on top of it. The fiber glass

could be sanded and I think that couldve made that

look.

kklaw (/member/kklaw) .


I would be careful with sanding through any of the hemp fibres, that is

where the tensile strength of the joint comes from. The epoxy provides a

matrix that helps to evenly distribute the forces throughout the joint but the

fibres need to remain intact to provide any tensile strength. Chris's idea of

a layer of fibreglass on top for cosmetics and some protection is often how

fibreglass is applied. This is why carbon fibre must not be scratched, its

structural integrity is severely compromised if any fibres are broken. This

is a great project, I'm excited to try it with carbon.

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peligro (/member/peligro) .


I think the author intentionally had the joints look fibrous. If you

soak the hemp cord in epoxy, once you put it all on the frame it

should fit a lot smoother than in these pictures. And you will

definitely be able to sand it down, it just won't be easy. Once

the epoxy has cured the hemp/epoxy matrix acts like any

laminate in that it is a relatively homogeneous material. It

should be solid throughout.

Fun project. Thanks for the help.

(http://cdn.instructables.com/FP6/FULX/HRI97B3I/FP6FULXHRI97B3I.LARGE.jpg)

cameronbrown (/member/cameronbrown)

Here is my finished bike, with a step by step writeup

http://www.cameronbrown.ca/blog/2013/09/bamboo-bike-

build-part-3-final-touches/

Kelly02 (/member/Kelly02)

It must be lighter than usual bikes. Nice work.

dlu (/member/dlu)

Hi~

I've a little Q:

How's ur bike now~?

ayasbek (/member/ayasbek) (author) .

dlu (/member/dlu)

I have stopped riding this one. My other bamboo bike has been sitting

outside under a tarp for over a year now and still rides and feels great.

rjpeterson (/member/rjpeterson)

In response to:

"ayasbek (author) says: Jan 6, 2009. 4:10 PMReply

Wow! Looks good except for that one thing! I am so glad you

got this far. Here is an idea - try get a different fork. Do you

have a local frame builder you can speak to who could make

you something? There are many old steel forks that have a

good amount of rake/drag or whatever the offset from the

headset is called. Another idea is to get a 650 wheel

(sometimes called triathlon wheel). It is smaller and may

allow you to ride your bike. It would also give you a super

track star look but will lower your bottom bracket a bit. Either

way be careful. If you really want to remove the hemp epoxy

CobyUnger (/member/CobyUnger) made it!

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6/11

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I think I would try a hacksaw or grinder. Chemicals seem like

a bad idea."

Getting another fork with more rake is not a good idea. It

may solve the problem of your wheel hitting the downtube,

however the bike will have terrible steering characteristics.

Bikes have a property called "trail". Trail is the distance

behind the steering axis that the front wheel contacts the

ground. Modern bikes with comfortable steering generally

have a trail around 2-3 inches. In your picture above, the

bike has close to zero trail. If you put a fork with more rake

on that bike, you would end up with a non-existant or a

negative trail. This would result in a bike that does not wantto ride straight. In fact the fork will try to flip 180 degrees

before it will go straight. Using a smaller front wheel would

result in the same problem

Dandie (/member/Dandie)

I think It is not a very good idea to build a bike frame of

bamboo because It’s impossible to assure strong and safe

oint sticks, especially in the headset, one of the most

stressed pieces. I have seen more than once headset

breakages and I can assure that the consequences for the

drivers have been horribly serious, they hit the pavementwith their faces,……. noses, jawbones, teeth smashed. I

think this is not a matter to play with.

syphek (/member/syphek) .

Dandie (/member/Dandie)

properly treated bamboo has a tensile strength equal to or greater than

mild steel.

snotty (/member/snotty)

Yeah, bamboo bikes are awesome. Make sure to build your

lugs strong and use Tonkin or Iron bamboo or you may have

problems.

(http://cdn.instructables.com/FVU/5RVJ/GNXX3JQV/FVU5RVJGNXX3JQV.LARGE.jpg)

chuck190 (/member/chuck190) .

snotty ( /member/snotty)

I plan to substitute top tube top tube of my steel bike with some bamboo

of about 1" diameter (I could make it 1.25" if necessary). If I use iron

bamboo of about 1"diameter, does anyone know if drilling out the center

with, say, a 3/8" drill would weaken it too much? That would leave walls of

about 5/16" or 8 to 9mm. I have read that walls of hollow bamboo should

be a minimum of 3mm.

snotty (/member/snotty) .

chuck190 (/member/chuck190)

Of course the only sure way to know is to test it.

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7/11

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But I've used bamboo with ~4mm sidewalls and it's been fine. Be gentle

when you drill, if you push too hard it might splay the bamboo apart and

crack. I've had trouble with this before.

Also be careful to let the drill find its own way down the hollow or you

might drift too far to one side.

chuck190 (/member/chuck190) .


snotty - Your last sentence - drilling down the hollow - makes me think

that maybe you don't know that iron bamboo is not hollow - it's the only

species that's solid. I have already drilled hollow bamboo without a

problem. Actually, when it split, I simply wrapped it with carbon tape. I

used a pair in place of the steel chain stays. It has taken quite a pounding

on some very rough roads without a problem.

But I would like to experiment with iron bamboo because I can make them

into any diameter I need with a wood lathe. I'm thinking it would be OK to

drill them to take weight off, but I was just wondering if anyone has had

experience with this.


chuck190 (/member/chuck190)

Ah yes. For some reason I thought iron bamboo had a little hollow area. I

must be thinking of some other type.



Yes, that's a bamboo wind turbine in behind me there:

http://www.instructables.com/id/Wind-Turbine-Blades-from-Bamboo/

(http://www.instructables.com/id/Wind-Turbine-Blades-from-Bamboo/)

rudi.carfell (/member/rudi.carfell)

Where have you bougth your hemps? And whats important

to look at when I buy them?

davmaldo (/member/davmaldo) .

rudi.carfell (/ member/rudi.carfell)

Ebay! After some research, i believe you want the "bast" as it is

the strongest part of the plant, i.e. search "hemp bast fiber" and

you should get a few hits. I have had trouble sourcing hemp in

its non twine form.

LiquidLightning (/member/LiquidLightning)

Uh.. Where did you get the hemp? Untangling hemp ropes?

Cough cough.

foxes76133 (/member/foxes76133)

Hey Ayasbek, I have some questions I'd like to ask about

this project about "Heat Treating Bamboo".

I was wondering what tools you used for the project, and

how you used them. I would like to experiment, but due to

my finances, my experiments would also have to be useful,

because I don't have enough money to buy bamboo in bulkamounts, and use some of it only to ruin it because of

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8/11

Reply4 years ago

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experimentation.

I've been trying to work on a project of my own as well, but

not making a bamboo bike, it's actually to make shafts for

Arrows for my bow. So I'd like to know more. Otherwise, I

have to do a search and destroy all over Goggle just to find a

dealer in my local area just for Heat Tempered Bamboo.

sephiroth67 (/member/sephiroth67)

Hope it's not TOO late, but B2 sounds like a fine name...fits

your description of a stealth bomber, and you can just say it

stands for bamboo =D

mykall (/member/mykall)

hey there,

amazing job you did there, you have my greatest respect.

We were thinking of trying to build one in our bicycle

cooperative, but the fella we are getting hemp from needs to

know what kind of hemp fibre we need, how thin, and how

clean, and also of course how much.

I was wondering if you could possibly help me with some

advice?

how much did you use on one bicycle and what sort of hempwere you using?

look forward to your help

fgunnar (/member/fgunnar)

Out of curiosity, how much does it weigh?

geekonabike (/member/geekonabike)

The Woody

EngineerJakit (/member/EngineerJakit)

So if you were to build something out of either green or

heated bamboo, which would be the easier to work with?

mainly with flexibility and hardness.

mad doctor (/member/mad doctor)

How did you get your bottom bracket shell out of the bike?

Most of the bikes I have looked at have their bottom bracket

shells welded on.

frisbeechamp1983 (/member/frisbeechamp1983)

can this be used to make a hardtail mountain bike?

willrandship (/member/willrandship)

Calc for blog cred...:P

Cool idea, but I'd be very afraid to ride it, myself. Even if a

professional built it :P

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9/11

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willrandship (/member/willrandship)

Fear is scary stuff eh. Seriously though; I made a bamboo bike really

badly and it broke in lots of places but it never fell apart. It just got wiggly.

NetReaper (/member/NetReaper)

Could you use a second metal piece under the seat that you

put at the bottom? It seems like it's the same angles and it

would be sturdier.

Dylan Roberts (/member/Dylan Roberts)

The Bambicycle or The Bambike. Yeah...

a918bmxr (/member/a918bmxr)

i have seen a frame break and the rider got a huge gash

across his stomach from where the top and bottom tubes

attached to the head tube... it wasn't pretty D-8

Oxzane68 (/member/Oxzane68)

No offesnse, but I built one, and it shattered.

SirRidesalot (/member/SirRidesalot)

http://www.ridepanda.com (http://www.ridepanda.com)You

should also check out what some guys from Colorado are

doing at http://www.ridepanda.com.

(http://www.ridepanda.com.) Their company, Panda

Bicycles, looks like it's making some sweet bamboo bikes

with steel lugs.

thepelton (/member/thepelton) .

SirRidesalot (/member/SirRidesalot)

Neat! I live in Colorado Springs! I may be up for a field trip. I

wonder if there is any way to do the spokes in smaller bamboo?

thepelton (/member/thepelton) .

thepelton (/member/thepelton)

Never mind! If you look at the calfeedesign.com website, you

see that very thing done in Africa. It makes for a stronger back

wheel that can carry larger loads than the standard wire

spokes. 8>)

jentran (/member/jentran)

For the headset, perhaps you could cut one so that there are

nodes at either end to increase stiffness. There are more

nodes located at the bottom of a bamboo culm than at the

top. I'm not sure how thick the walls of the headset you tried

was, that could help too. Some other people sprayed

expanding form successfully to increase stiffness to the seat

tube.

http://www.instructables.com/member/jentranhttp://www.instructables.com/member/thepeltonhttp://www.instructables.com/member/thepeltonhttp://www.instructables.com/member/SirRidesalothttp://www.instructables.com/member/thepeltonhttp://www.ridepanda.com./http://www.ridepanda.com/http://www.instructables.com/member/SirRidesalothttp://www.instructables.com/member/Oxzane68http://www.instructables.com/member/a918bmxrhttp://www.instructables.com/member/Dylan%20Robertshttp://www.instructables.com/member/NetReaperhttp://www.instructables.com/member/willrandshiphttp://www.instructables.com/member/snotty


10/11

Reply6 years agommann1123 (/member/mmann1123)

Hey everyone I have found the large majority of 'how to' sites

lacking in specificity. I am putting together a blog with a lot

more detail and experiments together come check it out at

http://bamboobike.wordpress.com/

(http://bamboobike.wordpress.com/).

There are a lot of pictures and good details on how to

choose materials, how to miter better, even how to make a

hemp fiber head tube etc. Hope it is helpful.

(http://cdn.instructables.com/FIF/01ZM/G6MPMZC1/FIF01ZMG6MPMZC1.LARGE.jpg)

(http://cdn.instructables.com/F5G/5YVD/G825R9XT/F5G5YVDG825R9XT.LARGE.jpg)

(http://cdn.instructables.com/FWA/669M/G825R9XS/FWA669MG825R9XS.LARGE.jpg)

(http://cdn.instructables.com/F6G/SJ44/G825R9XR/F6GSJ44G825R9XR.LARGE.jpg)

I

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11/11

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