Not sure of the exact measurements but we have a Tracker Pro Team 175 txw and took it down to the guys at Cumberland Crappie a few weeks ago and got our double seat mount and the rod holders. We ended up with the 32" adjustable mount and we have plenty of room and still not sitting right on the edge of the boat. I know the length across the deck in line with the factory pedestal mount is 60". Hope that helps some