I ride a Hed disc. It's not noisy- in fact a lot quieter than a zipp. It's not cheap(ly made). The carbon is not really stiff but you would not want it to be for that kind of wheel. You want it to be stiff enough to hold it's shape in all riding conditions- no stiffer. Otherwise you're just adding unnecessary weight to it. It is not a structural component.

I got it new for like $900 and it is every bit as aero as a $2600 zipp and the weight difference is inconsequential.

Plus it has an aluminum brake track so braking is much much better.

I don't know anything about the vision wheel.

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Ed O'Malley
www.VeloVetta.com
Founder of VeloVetta Cycling Shoes
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