I have the extension on the auger in the pic so it is about 60 inches. The same width as the pioneer. It is a the "Digger" Auger carrier. They are bar none the best, most simple set up out there. I have one on the snowmobile also.
I welded the receiver hitch to the front of the tube that is directly below the sticker on the auger holder. This gave me a nice flat surface to mount the auger carrier to. I will get a picture or two and post up.