Check out the world’s Biggest Truck: Ford F-750 Luxury Truck by Dunkel Industries. Dunkel Industries’ Luxury 4×4 – the largest pickup truck we’ve ever seen at SEMA. It’s 8.5 feet wide, 32 feet long and almost 12 feet tall! The Dunkel 4×4 is an RV and pickup fused together. It’s built on a Ford F-650/F-750 chassis with a bed that’s big enough to fit a full-size car with room on the top for dirtbikes. There’s no need to tow a trailer!