Yeah that was my thought exactly when I went to purchase it, but the trailer is a Four Winns matching trailer that came with the boat when it was new (97). I would have really liked it if it had the tandem axels. It makes for a much better handling, and easier to maneuver trailer. Before I looked at this one I saw the exact boat but 1 year newer and it also had the single axel. I'm not really sure why 4Winns did this.