I’ve been riding on my Oracle 29er with a 2" Big Apple which has a Dominator 2 rim for just over a year now. I’m on my second one in fact. UDC in the US sells that size on the Nimbus 29er and the road version of the Oracle. If you do a search on this forum about the 2" Big Apple tire you’ll come across reports of it blowing off rims. So far I haven’t had that problem. I keep the tire inflated to ~40 PSI. If I remember correctly people that had problems inflated their tires higher than that.
Check this out as well.