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 Post subject: Eiffel Bike
PostPosted: Wed Jan 22, 2014 11:44 am 
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Joined: Thu Apr 01, 2010 10:24 am
Posts: 595
Did someone already post this? Thought it was pretty cool...

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 Post subject: Re: Eiffel Bike
PostPosted: Wed Jan 22, 2014 2:27 pm 
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Joined: Sat Dec 13, 2003 2:25 am
Posts: 4716
Location: Canada
Nice find. A full isotruss bike. Pretty neat.


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 Post subject: Re: Eiffel Bike
PostPosted: Wed Jan 22, 2014 4:32 pm 
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Joined: Wed Apr 25, 2007 10:23 am
Posts: 1008
Location: Pack filler
a little similar
Image




http://www.mbaction.com/Main/News/Delta-7-Sports-Arantix-2037.aspx

and only 5 years earlier.

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 Post subject: Re: Eiffel Bike
PostPosted: Wed Jan 22, 2014 5:39 pm 
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Joined: Fri Jun 01, 2012 6:40 pm
Posts: 201
I wonder how it would hold up in the wind tunnel.


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 Post subject: Re: Eiffel Bike
PostPosted: Thu Jan 23, 2014 12:30 am 
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Joined: Mon Jan 06, 2014 4:30 am
Posts: 67
Geoff wrote:
Nice find. A full isotruss bike. Pretty neat.


I can't believe that they did not deck it out with the M5 brakes as they would be a perfect match. Amazing amount of work but still a fair bit heavier than the top shelf frame sets.

Cheers baz


Sent from my iPad using Tapatalk


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 Post subject: Re: Eiffel Bike
PostPosted: Thu Jan 23, 2014 11:53 am 
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Joined: Fri Apr 12, 2013 1:19 pm
Posts: 742
Location: South West England
But why? It's not even vaguely light...

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BMC SLR02 - 7.6kg - cracked too...
Kinesis Aithein - 6.9kg - hit by car!

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 Post subject: Re: Eiffel Bike
PostPosted: Fri Jan 24, 2014 12:48 am 
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Joined: Sat May 04, 2013 5:34 am
Posts: 40
^ maybe stiffer?


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 Post subject: Re: Eiffel Bike
PostPosted: Fri Jan 24, 2014 9:45 am 
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Joined: Fri Apr 12, 2013 1:19 pm
Posts: 742
Location: South West England
True, but can you honestly tell me you, or more regular cyclists, would notice this very slight difference?

Obviously it's a concept, but in the real world it has very little practicality.

_________________
Scott CR1 - 7.1kg - cracked
BMC SLR02 - 7.6kg - cracked too...
Kinesis Aithein - 6.9kg - hit by car!

MASON Definition | Camapgnolo Chorus/Potenza | TRP Spyre SLC | Novatec CXD - TBC


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 Post subject: Re: Eiffel Bike
PostPosted: Fri Jan 24, 2014 10:10 am 
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Joined: Tue Jan 27, 2009 8:19 pm
Posts: 361
It would be interesting to have the stiffness figures - obviously it's moderately heavy for a carbon frame, but let's say it turned out to be 50% stiffer than a standard high-end modern frame. Then perhaps it would be possible to build something similar that was lighter and also as stiff as modern frames.

But I strongly suspect that this isn't the case - different construction methods are better suited to different purposes and different materials, and suspect that this is a very suboptimal construction method for making a carbon bike frame. Presumably it's also suboptimal for making a steel frame, otherwise we would have had micro-trussed bike frames for years instead of ones made out of thin butted tubing.

I'm not an engineer, but I suspect that the reason this doesn't work is that the trusses are on the wrong scale for the application - a bike frame already is a rigid structure made of two open triangles, but by breaking those down into hundreds of smaller triangles you are just adding redundant complexity, which is bound to introduce functional inefficiency.

Looks cool though.


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 Post subject: Re: Eiffel Bike
PostPosted: Fri Jan 24, 2014 5:06 pm 
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Joined: Sat May 04, 2013 5:34 am
Posts: 40
Devon wrote:
True, but can you honestly tell me you, or more regular cyclists, would notice this very slight difference?

Obviously it's a concept, but in the real world it has very little practicality.


I have no argument there, but since when has the cycling community, especially one concerned with dropping grams off of the weight of bikes by any means necessary, been concerned about practicality?


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