A frame is the skeleton of a car, or any vehicle for that matter. Its parts include the chassis, frame rails, cross members, gussets, steering components, tires, shocks, seats, and dash. It provides support to the vehicle and gives its shape. On top of this, a truck can add several accessories and equipment that are essential to it, including bed extenders, a towing hitch and heavy duty winch.
When we talk about the frame of a vehicle, we refer to the entire structure that makes Truck Accessories the vehicle capable of moving. This includes the chassis, frame rails, cross members, gussets, tires, shock absorbers and steering components.
Trucks are made from a number of different types of materials and have numerous types of engines. Depending on what type of truck you are talking about, it may be steel, aluminum, aluminum alloy, fiberglass, carbon fiber, wood, plastic, or a combination of the above. Most trucks have a frame made of steel or metal. The frame rails are usually made of metal.
A truck can also have a frame made of fiberglass, a combination of metal and fiberglass, or a frame made of a combination of plastics and metals. The cross members that hold the frame together are usually metal, plastic, or fiberglass.