Marc,
They're a little tough to adjust perfectly, the bearing surfaces aren't as smooth and hard as the best from high-end manufacturers, the shells are not highly polished, and they don't have any winged wheels or other identifying symbols to enhance their quality. I have built a couple of wheelsets with them, and find them to be durable with low rolling resistance (if adjusted just so). Just replace the bearings with highet quality ones next time you rebuild them, and you'll like them even more.
Galen Poole
Jackson, MS
>I picked up a wheel set with these hubs, they seem
> nice but from what I've read most people hate them.
> What exactly is the problem with them? They're sealed,
> are the bearings prone to failure?
>
> marc garcia
> chicago IL