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Do those carbon weaves have a purpose? Or are they just for looks? I have read that different brands have different different types of weaves but are the weaves laid the same way in the whole frame or is it just at the top layer?
 

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The 90 degree pattern most often exposed on bike parts is often the "decorative" outer layer. What's underneath may look quite different. Round tubes are often filament wound, which looks quite different. That's one advantage of carbon fiber, the fibers can be oriented to increase strength or flexibility in a particular direction.


http://www.advancedcomposites.com/custom.htm
 

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Jared said:
Do those carbon weaves have a purpose? Or are they just for looks? I have read that different brands have different different types of weaves but are the weaves laid the same way in the whole frame or is it just at the top layer?
The finish (outer) layer of CF can also serve to increase the "toughness" of the component. It can resist abrasion and damage due to bumps and knocks. Usually it is a 90 degree weave and may be covering a uni-directional CF tow which is more prone to damage.

Having said that, it also obviously serves a cosmetic purpose and most companies apply it very carefully as the consumer will see this. A sloppy finish layer would make most of us suspicious of the quality of the entire component.
 
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