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These Frames Any Good?

Old 09-10-09, 05:28 PM
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Tim2
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These Frames Any Good?

After reading at a science site about these lightweight bike frames,I was rather impressed.Have any of you guys heard of this outfit,called Delta7? Hell the frames are see-thru!

http://delta7sports.com/

Carbon fiber/Kevlar frame
Frame weight 2.6lbs (M)
No rider weight limitations
Limited production
Most durable frame available
Lifetime warranty
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Old 09-10-09, 05:43 PM
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unterhausen
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my view is that it's a solution in search of a problem, i.e. a gimmick. It's really hard to beat a tube for bicycle construction.
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Old 09-10-09, 06:37 PM
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Allen
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Are those Brano Meres doing or is someone copying his design study?
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Old 09-12-09, 08:41 PM
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[quote=unterhausen;9651952]my view is that it's a solution in search of a problem, i.e. a gimmick./QUOTE]

I dunno- see through frame tubing sounds like a pretty usefull idea to me. That way, when you pass a pothole with your front wheel you can still see where it is in relation to the rear wheel .
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Old 09-12-09, 09:54 PM
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I'd wrap them with something before any off road riding. Don't want the thing filling with mud and sand.
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Old 09-12-09, 10:45 PM
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As long as you're putting all those holes in, you may as well do something useful with it. E.g.
the Alex Moulton "space frame" folding design from the 1950s:

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Old 09-13-09, 02:48 AM
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Originally Posted by unterhausen View Post
my view is that it's a solution in search of a problem, i.e. a gimmick. It's really hard to beat a tube for bicycle construction.
My view is that it's a solution in search of a problem;, i.e, lawyers wanting to get rich quick.

Most of the science on there isn't sound science at all. If I had a nickel for every time a composites manufacturer tried to compensate for their lack of materials knowledge with an over application of misunderstood mechanics knowledge, then I wouldn't have to work for an aerospace first tier manufacturer. Hell, I've seen the same idiocy in the company I work for.

Essentially, yes, it's nice to look at, but so is a smooth, circular section tube assembly, well fitted and mitred. Form follows function, not the other way round and those lovely, well-wrapped trusses have some horrific stress-raisers at each of their interfaces.

My two penn'orth.
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