I don't know, Bob. The specs say that the width of the Expedition, from the outside edge of one mirror to the outside edge of the other, is only 91.8 inches. That's kinda narrow. Can you actually see down each side of the TM? For example, can you see if the door has come unlatched (something that has happened to a number of us)? Can you see the tires on each side, so you will know if you have had a blowout? The TM is so well behaved with a flat that you may not even realize you have a problem unless you can see it at a glance in the mirror. (Been there, done that.) Can you see if all the running lights are working? Can you see someone standing 100-200 feet behind your trailer, as is required in some states?
http://www.trailmanorowners.com/foru...ead.php?t=3658
Bill