I posted in the XF forum, but didn't get any responses. I found a set of 19 inch wheels that are a guaranteed fit for my XF SC. They are Ace Alloy Executives. Anyone have any knowledge of this company? Also, I understand there are two frequencies of TPMS, a low and a high. Cost is more for the high frequency. I was told by wheel dealer they can tell which one I need by the VIN. Does this sound correct?

Thank you.