Its one of those simple ideas that make a ton of sense. Convert-a-Ball now makes a 2.5-inch ball mount for Ford, GM, and Ram HD offering an internal polyurethane material that essentially acts as a shock absorber for the trailer. Rated to have an 18,000-pound trailer weight and 2000-pound tongue weight, the mounts can be ordered with 2 to 12 inches of drop at a cost starting around $75.