The SuperHitch 30K frame mounted receiver is rated up to 30,000 lbs pull and 3,000 lbs tongue weight with weight distribution (20,000 lbs pull and 2,500 lbs tongue weight carrying) in either the upper or lower receivers (when used without the SuperTruss extension). The extension towing capacity increases to 12,000 lbs. with 48” the SuperHitch SuperTruss receiver extension. The SuperTruss Extensions are available in 8 different lengths from 21” to 48” (extensions available to 60″). Both the SuperHitch Magnum 30K frame mount receiver and the SuperTruss receiver extensions use Industry standard 2” x 2” ballmounts, which eliminates the need for two ballmounts.