Fifth wheel (disambiguation)
A fifth wheel is a coupling that provides a link between the trailer and a truck (or a tractor unit).
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Fifth wheel may also refer to:
- Fifth-wheel trailer, a type of travel trailer that is a variant of the tractor-trailer version
 - Fifth wheel (Brooks Walker), an invention designed to aid parking cars
 - Fifth Wheel Truck Stops, a truck stop chain across Southern Ontario, Canada
 - The 5th Wheel, an American reality dating show
 - The Fifth Wheel (film), a 2013 comedy-drama film
 - "Fifth Wheel", a song by Avail from their 1998 album Over the James
 - An idiom meaning "an extra and unnecessary person or thing"
 
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