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2. Tractor unit - Wikipedia

   en.wikipedia.org/wiki/Tractor_unit

   Peterbilt 386 sleeper-cab–style commercial 6×4 tractor unit. A tractor unit, also known as a truck unit, lorry unit, power unit, prime mover, ten-wheeler, semi-tractor, semi-truck, semi-lorry, tractor cab, truck cab, lorry cab, big rig tractor, big rig truck or big rig lorry or simply a tractor, truck, lorry, semi, big rig or rig, is a characteristically heavy-duty towing engine that ...

3. Ballast tractor - Wikipedia

   en.wikipedia.org/wiki/Ballast_tractor

   The ballast box is a metal box installed on the rear chassis of the tractor instead of the fifth wheel coupling. Earlier heavy haulers unmounted the fifth wheel and used merely a piece or two of heavy rocks, stones or concrete blocks which weighted enough to avoid wheel spin, [4] later builders and heavy haulers developed metal boxes of ...

4. Fifth-wheel coupling - Wikipedia

   en.wikipedia.org/wiki/Fifth-wheel_coupling

   The fifth-wheel coupling provides the link between a semi-trailer and the towing truck, tractor unit, leading trailer or dolly. 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 ...

5. Nicolas Tractomas - Wikipedia

   en.wikipedia.org/wiki/Nicolas_Tractomas

   The TR1010 D100 model of the tractor was awarded the Guinness World Record in 2015 for the largest road truck in the world, weighing 71 tons. [ 2 ] Nicolas Industrie is a subsidiary of Transporter Industry International (Tii) a Heilbronn based logistics solution company specializes in trailers , spmt , heavy haulers and hydraulic modular ...

6. Dolly (trailer) - Wikipedia

   en.wikipedia.org/wiki/Dolly_(trailer)

   It is designed to couple to the concerned automobile's powered wheel, i.e. the front wheel of a Front-wheel drive automobile, or the rear wheel of a rear-wheel drive automobile, by locking the powered wheels onto the tow dolly's tray. The tow dolly is tow hitch connected to a tractor or truck. Tow dollies are legal in all 50 US states and Canada.

7. Articulated vehicle - Wikipedia

   en.wikipedia.org/wiki/Articulated_vehicle

   In the UK, tractor unit and trailer combinations are referred to as articulated lorries, or "artics". [1]A semi-trailer truck, also known as a semitruck, [1] (or semi, [2] eighteen-wheeler, [3] big rig, [4] tractor-trailer [5] or, by synecdoche, a semitrailer) [6] [a] is the combination of a tractor unit and one or more semi-trailers to carry freight.