New Sapim carbon fiber spokes at Interbike - Discuss!

[ergott]

Steel spokes can snap from contact too.

[jimborello]

They look promising for WW builds, but I wouldnt like to be an early adopter on this kind of stuff at this price.

[wrcompositi]

I will be looking forward to see Sapim's innovation come to fruition and Extralite make compatible hubs, that would be soooooo amazing! As a side note, a Taiwanese company has been making carbon spokes for some time…
About 2 years ago I searched the web for carbon spokes and this piqued my interest:
http://www.acmbike.com.tw/ENProducts.html
The site's content hasn't been renewed much since I last visted, so I assumed the carbon spokes may be just vaporware. Recently a much hyped wheelset mentioned by a few in Taiwan's bike forums grabbed my attention, the carbon spokes are exactly the stuff made by the aforementioned company.
Only facebook page in Chinese: https://m.facebook.com/coolstuffrims/mediaset?album=pb.401669656654024.-2207520000.1443265224.
Rear hub closeup:https://m.facebook.com/coolstuffrims/photos/pb.401669656654024.-2207520000.1443265224./519619898192332/?type=3&source=42
Spoke on the scale:https://m.facebook.com/coolstuffrims/photos/pb.401669656654024.-2207520000.1443265224./516883135132675/?type=3&source=42
(Claimed weight of 33mm tubular wheels 1050g, but my steel-spoked 38mm tubies are 20g lighter…
http://weightweenies.starbike.com/forum/viewtopic.php?f=10&t=124562)

But there's a problem keeping me from trying to get hold of these spokes for trial. If you scroll down the acmbike page, there's a tensile test report. The first property I looked for was Young's modulus(stiffness), which is laughably low, only 1267kgf/cm2=0.1243GPa. In comparison, 18/10 stainless steel has a modulus of 193GPa - more than 1000 times as stiff!? Moreover the carbon spokes by acmbike are only 2mm in diameter(maybe to accommodate normal hubs and simplify manufacturing), I just can't fathom why such noodle-like spokes could make rideble wheels? I know only basic mechanics of materials, so correct me if I'm wrong.

Opinions?

[F45]

Whenever I look up the modulus for T700 it's at least more than double that of steel.

[sungod]

Except carbon fails differently than steel. If a few spokes take a hit on something do they react like stainless steel spokes or do they snap like twigs?

cf does not snap like twigs, composites are tough

[bm0p700f]

I will ask the said rep who I know have email for about these and when they will be available.

[Zitter]

update on Edco

http://www.bikerumor.com/2015/09/28/ib1 ... cassettes/

[wheelsONfire]

update on Edco

http://www.bikerumor.com/2015/09/28/ib1 ... cassettes/

I use the 14-25 cassette and i love it!

So linear in ratios....