The Lift: Fixed tongue jacks such as the Fulton 2,500-pound heavy-duty drop-leg, bolt-on model ($139.99; trailerandtruck parts.com) offer greater load capacities than swing jacks to accommodate ...

While they're both heavy-duty hitches that connect large trailers ... Placing the hitch over the axle changes where the trailer's tongue weight falls on the truck, and your truck can carry a ...