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Old 03-29-14, 10:26 AM   #1
WonderMonkey
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Bicycle Made Out Of Cardboard

Behold, the $20 Bicycle. Even More Amazing Is What It?s Made Of. | Mobiledia

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Behold, the $20 Bicycle. Even More Amazing Is What It’s Made Of.
Cam Lincoln in Innovations & Inventions
Meet Israeli Izhar Gafni. He’s a designer and engineer. When he became obsessive with the idea of a durable, affordable bicycle, he decided to make it out of cardboard. Everyone told him it was impossible, until…
I don't know if the forks, etc. are made of cardboard but even if is just the frame and wheels it is still pretty cool.

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Old 03-29-14, 03:05 PM   #2
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I seldom open such film clips but I'm glad that I watched this one.

I'm pretty sure that there's some conventional bicycle parts buried under the cardboard but I still think that it's a pretty neat accomplishment.
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Old 03-30-14, 04:51 PM   #3
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Can we ride it in the rain?
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Old 03-30-14, 08:24 PM   #4
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with paint and fiberglass? I'd think so.
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Old 03-31-14, 10:25 PM   #5
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And it's already been debunked... Publicity stunt, selling the bike for $290 to "donors". No mass production has started. Nor will it in my opinion.

$20 cardboard bike project runs into obstacles - Fortune Tech
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Old 03-31-14, 10:59 PM   #6
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I wouldn't call it a stunt as it appears there is a serious effort to build a business around the idea, but the crowdfunding angle has died:

https://www.indiegogo.com/projects/the-cardboard-bike

Like many unconventional approaches to materials for machines (e.g., concrete boats), this is an interesting engineering exercise, but not necessarily one which has any practicality as a commercial product. I'm sure you could build a bicycle from pasta, toothpicks, and tie-wraps too.

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Old 04-01-14, 09:58 AM   #7
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I'm currently working on a cardboard bike project with my local Bike Collective and the Science station. We're going a slightly different direction than the guy in the above video. We're laminating multiple sheets of corrugated cardboard together in a vacuum bag, and siphoning fiberglass resin into it. The result is like plywood, but a little lighter. It's plenty stiff. We're using salvaged bike wheels, handlebars, fork, seat, etc. to simplify the project.

It may just work. I'll make a post on it later this month when we're done.

It's a pointless engineering exercise, really. It's not very "green" because we're using nasty resin. Recycled steel and aluminum frames are more "green". But it's a fun exercise.
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Old 04-01-14, 04:32 PM   #8
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Originally Posted by Tim_Iowa View Post
I'm currently working on a cardboard bike project with my local Bike Collective and the Science station. We're going a slightly different direction than the guy in the above video. We're laminating multiple sheets of corrugated cardboard together in a vacuum bag, and siphoning fiberglass resin into it. The result is like plywood, but a little lighter. It's plenty stiff. We're using salvaged bike wheels, handlebars, fork, seat, etc. to simplify the project.
I bet it will work very well. You're essentially doing a composite bike, but instead of pricey carbon fiber, you're using cardboard fibers.

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Old 04-02-14, 07:21 AM   #9
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I bet it will work very well. You're essentially doing a composite bike, but instead of pricey carbon fiber, you're using cardboard fibers.
Exactly. It will be a CAR(dboard) FIBER bike. We crossed the grains in each ply of cardboard to get even more strength, but it's still no match for carbon, obviously. For the next attempt, we'll probably try to vacuum the frames onto a form to get a good spread angle for the rear hub.

My triumph so far has been machining a bottom bracket cup out of a cardboard/resin log we made. The bearing races for the ashtabula will press right in. We're using super-stiff cardboard tubes (like the inside of a paper roll) for the seat and head tubes.

We're keeping it simple for the prototype: single speed crank, coaster brake hub.
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