Fifth-wheels are so named because they have an extension on the front, which houses the bedroom, and ends in a plate that looks like a wheel (that's where the 5th wheel part comes in).

This wheel attaches to a receiving hitch (called a fifth-wheel hitch or goosewing hitch) in the bed of the full sized pick-up truck that will tow it. The arrangement effectively provides living space and increased support and stability for towing. It is very important to match up the size and weight of the 5th wheel trailer type and its associated pick-up.

Fifth-wheel trailer lengths range from 21 to 40 feet. Dry weights (no fluids or personal belongings) range from 8,000 to 18,000 lbs. Generally, fifth-wheels offer plenty of room inside - often with multiple slides adding extra living space. Fifth-wheel trailers provide full kitchen area, dining area, living room, bathroom, and bedroom. Smaller or older models may have limited headroom in the bedroom area. It is pretty standard to have a VCR, and TVs. And a washer/dryer may come standard or as an option.

Fifth-wheel trailer types include their own heating, air conditioning, propane supply, electrical systems, and water tanks (fresh water, grey water, black water). Many newer models have designs that provide more storage inside and out. Prices range from $15,000 to $150,000.