Umphetho wevili ubhekisa kwindawo apho i-asi ifakwe kumbindi wevili. Yinto ebalulekileyo edibanisa i-drum ye-brake (okanye i-disc ye-brake), i-wheel disc, kunye ne-axle yesiqingatha. Ifakwe iibheringi kwityhubhu ye-shaft okanye ijenali ye-knuckle. Ukuba umphezulu werim yevili ukrwelwe ngempazamo yinto eqinileyo, oko kunokukhokelela kwinkangeleko engathandekiyo yomphetho wevili. Ngokuhamba kwexesha, ukubola komphezulu kunye ne-oxidation yeendawo ezonakalisiweyo zevili lesondo kunokuchaphazela ukusebenza kwayo. Ukuba isithuthi siyashukuma ngelixa siqhuba, okanye ukuba akukho ngxaki kwisantya esiphantsi kodwa kukho imvakalelo yokungcangcazela ngelixa uqhuba ngesantya esiphezulu, isenokuba yingxaki kwi-wheel hub. Xa ujonga umonakalo we-hub yevili, yahlula isondo kwivili, susa ivili emzimbeni, ukhuphe ivili ukuze ubone ukuba kukho naziphi na iziphene, ukuphuka, izithuba, izibonda, njl.