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  2. Wheel sizing - Wikipedia

    en.wikipedia.org/wiki/Wheel_sizing

    5x114.3 5x115 5x118 5x120 ... will have either flat, tapered (conical), or ball (radius) seats. ... A wheel used on a free rolling trailer axle will carry more weight ...

  3. Trailer connectors in North America - Wikipedia

    en.wikipedia.org/wiki/Trailer_connectors_in...

    Flat 5-pin connector (Towing vehicle side) This contact is not as common, but is compatible with the 4-pin connector in the way that a towing vehicle with this connector can be connected to a trailer with the 4-pin flat plug. The extra connection is often used to block the surge brakes when reversing with the trailer. #

  4. Container chassis - Wikipedia

    en.wikipedia.org/wiki/Container_chassis

    A container chassis, also called intermodal chassis or skeletal trailer, is a type of semi-trailer designed to securely carry an intermodal container. Chassis are used by truckers to deliver containers between ports , railyards, container depots, and shipper facilities, [ 1 ] : 2–3 and are thus a key part of the intermodal supply chain .

  5. Flatcar - Wikipedia

    en.wikipedia.org/wiki/Flatcar

    Spine car with one pup trailer. A flatcar (US) (also flat car, [1] or flatbed) is a piece of rolling stock that consists of an open, flat deck mounted on trucks (US) or bogies (UK) at each end. Occasionally, flat cars designed to carry extra heavy or extra large loads are mounted on a pair (or rarely, more) of bogies under each end.

  6. Fifth-wheel coupling - Wikipedia

    en.wikipedia.org/wiki/Fifth-wheel_coupling

    The coupling consists of a kingpin, a 2-or-3 + 1 ⁄ 2-inch-diameter (50.8 or 88.9 mm) vertical steel pin protruding from the bottom of the front of the semi-trailer, and a horseshoe-shaped coupling device called a fifth wheel on the rear of the towing vehicle. As the connected truck turns, the downward-facing surface of the semi-trailer (with ...

  7. Vehicle frame - Wikipedia

    en.wikipedia.org/wiki/Vehicle_frame

    Ladder frame pickup truck chassis holds the vehicle's engine, drivetrain, suspension, and wheels The unibody - for the unitized body - is also a form of a frame. A vehicle frame, also historically known as its chassis, is the main supporting structure of a motor vehicle to which all other components are attached, comparable to the skeleton of an organism.

  8. Car carrier trailer - Wikipedia

    en.wikipedia.org/wiki/Car_carrier_trailer

    An American commercial car carrier typically fits between 5 and 9 cars, depending on the car size and trailer model (capacity is limited by an 80,000 lb weight cap that a road vehicle is subject to under U.S. law. [1] [irrelevant citation]). Significantly higher-capacity vehicles have been observed around the world, such as a side-by-side ...

  9. Trailer connectors in Australia - Wikipedia

    en.wikipedia.org/wiki/Trailer_connectors_in...

    Round 7-pin trailer connector Type 1, Australian Standard 2513. In this pinout for an ISO 1724 connector, the position light pin is used for electric brakes (Pin 5, 58R), which means that if you connect a trailer with electric brakes to a towing vehicle wired according to ISO 1724 and turn on the position lights the trailer will be braking. Pin ...