bm0p700f wrote:The super spoke is 1.8mm dimeter at the elbow and is therefore less fatigue resistanced than a CX-ray also spoke holes that are 2.6mm dimeter will result in more movement of the spoke and faster fatigue.
I don't think it's a problem. The spokes shouldn't be going slack anyway, so the elbow will remain embedded in the flange under some tension. And if you are worried about it you can use spoke head washers.
I agree that the round version is useless... mostly because I believe any special expensive spoke needs to be aero also.
And in that theme the CX-Super might have some practical use for NDS and front wheels, but I'd like to see a bigger weight reduction to make them worth the trouble.
F45 wrote:...material modulus of elasticity...
Modulus of elasticity and elastic limit are two things to consider.
One is how "stiff" a material is (how much force is required to move a distance) and the other, at what force will the material no longer be able to return (elastic) to where it was. Common speak - it got over stretched.
Both are real and different aspects of a spoke wheel. At some tension (too lazy to look it up), the spoke will permanently elongate and not return to the original length.
A spoke may have a higher elastic limit, but also be more elastic (less stiff) - Titanium for example.
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Spokes do exceed their elastic limit too but more in terms of following a straighter path out of the hub shell than an actual increase in linear length. In other words, spokes go from slightly bowed to more straght, which increases their effective length without significantly effecting their linear length. Perhaps that is what you meant, sorry if I misunderstood.
Also, it goes without saying that eyeletted rims offer another point of potential bedding.
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