Quick question, when you had the tire on roof how did you like it. Did you notice any diff in mileage or top heaviness? I mean I know there will be a difference for top heaviness but is it much? And how did you have it mounted it up there, bracket or ratchet straps? I am thinking of sticking it up there on my XJ right in the roof rack because it is annoying in the back, every time I look back and need to see on that side without swinging my head to look in the mirror all I see is a Tire. Not a big deal but would like to try it on the roof.