<P> The cargo trailer usually has tandem axles at the rear , each of which has dual wheels , or eight tires on the trailer , four per axle . In the US it is common to refer to the number of wheel hubs , rather than the number of tires ; an axle can have either single or dual tires with no legal difference . The combination of eight tires on the trailer and ten tires on the tractor is what led to the moniker eighteen wheeler , although this term is considered by some truckers to be a misnomer ( the term `` eighteen - wheeler '' is a nickname for a five - axle over-the - road combination ) . Many trailers are equipped with movable tandem axles to allow adjusting the weight distribution . </P>
<P> The cargo trailer usually has tandem axles at the rear , each of which has dual wheels , or eight tires on the trailer , four per axle . In the US it is common to refer to the number of wheel hubs , rather than the number of tires ; an axle can have either single or dual tires with no legal difference . The combination of eight tires on the trailer and ten tires on the tractor is what led to the moniker eighteen wheeler , although this term is considered by some truckers to be a misnomer ( the term `` eighteen - wheeler '' is a nickname for a five - axle over-the - road combination ) . Many trailers are equipped with movable tandem axles to allow adjusting the weight distribution . </P>
how many tires does a 18 wheeler have
how many tires does a 18 wheeler have
eighteen
eighteen