The Trail King TKHDG has been the go-to detachable lowboy for construction professionals for over two decades, and Trail King calls it North America's bestselling trailer of its kind. It is engineered so unhooking, loading, unloading and hooking up again is a simple one-person operation. Four models run from 70,000 to 120,000 lb capacity in 12 feet, on decks from 24 to 25'9".