4 Wheel Parts says they are not
hub centric. I was a little worried about them not being hub centric as well. When I first put them on, there was a little shake in the wheel. I went back and had them rebalanced, and they said they were balanced wrong previously. With the new balance, they ride great.
I have read that there are hub centric adapter rings you can add to your hub to make it a little bigger and make the wheel act as a hub centric wheel.