Before you get too comfortable with Crossfire, I suggest you read this thread.
Tireman9 is an industry expert on tires.
If you don't also have a TPMS, you are likely to have tire issues and vehicle damage that you may not have anticipated.
http://www.irv2.com/forums/f52/blew-...al-334620.html
Pay close attention to posts 7, 11, 16, and 19
My TPMS saved me $700 on a tire, and untold damage to my rig.