A full-size pickup is a large truck suitable for hauling heavy loads and performing other functions. Most full-size trucks can carry at least 1,000 lb (450 kg) in the rear bed, with some capable of over six times that much. The bed is usually constructed so as to accommodate a 4 ft x 8 ft sheet of plywood. Most are front-engine and rear-wheel drive with four-wheel drive optional, and most use a live axle with leaf springs in the rear. They are commonly found with an I6, V6, V8 or V10 engine with Diesel often as an option.