Home » Training » Trailer Glossary » Tractor TractorA Tractor (semi-truck) is a motor vehicle designed primarily to pull a semi-trailer. The connection is made via a fifth wheel that is mounted over the rear axle. Tractor Manufacturers / BrandsFreightlinerInternationalKenworthMackPeterbiltVolvoWestern Star Share on Facebook (Opens in new window) Facebook Share on X (Opens in new window) X Share on Reddit (Opens in new window) Reddit Share on Pinterest (Opens in new window) Pinterest Share on LinkedIn (Opens in new window) LinkedIn