Worst case is at the B pillar of the cage at roofline. It's About 5" inset from the outside edge of the tire. (there is the head of a roof fastener) The C pillar tapers back to about 6".I am looking to buy a 2020 live valve 4 seater and I am trying to make sure it will fit in my toy hauler. I was hoping someone could measure the inset of the cage from the tires. I know the width is 64 inches that part is easy. I however have a cabinet that is on the side of the toy hauler that I am hoping clears. So I am trying to see if someone knows or can measure how far back is the edge of the cage form the outside of the tire. Any help would be awesome.