106-4634 Bethgon Coalporter Wagon Set (8) Norfolk SouthernSince 1982, the BethGon Coalporter has been hauling black diamonds across the United States. The largest selling Coal Gondola in the world, the cars double tub design increases hauling capacity while reducing maintenance requirements. Tubs below the car lower the center of gravity, providing a smoother ride. Today, coal is no longer sold at the volume it once was in the United States, and many coal carrying railroad cars have sadly been left to rust.