From experience, if you're running oversized tires on your X; I don't recommend the use of chains. Running stock size you should be fine.

Get rid of the stock tire, you need A/T's, and I highly recommend Revo's over BFG K/O for snow traction.

Another big help is to keep your air pressure slightly less then you would in the summer months, for greater traction. And use about 120# plus of sand-bags thrown in the back.