You got a GREAT set of tires, expecially considering the price. If I were you, I would sell them and get a set of A/S if you are going to drive them year round.

I have these tires all the way around on my OEM wheels for the winter and as Matt and Pman have said, they are ONLY a winter tire, and you will not be happy with them year round, unless you absolutely drive your XF like it was a Honda Odyssey and do not mind the tires sounding like a lifted ford on 38" mudders (obviously an exageration, but you get the point).

Since you got such a good deal, I would wait until right before next winter, sell them as brand new on here to someone who needs them and buy the all seasons.....