[nem]

My door opening is 6'10.5" and the tip of my antenna drags IF there is no passenger in the truck. That's with 265/70 R17 Tires, one size up from stock.

I measured the roof clearance before I bought it but I didn't even notice or think about the antenna until a few months after we bought the truck, I just happened to notice it rub one time when I pulled in - Lucky me!