Ƙushin hannu shine hinge da tayar ke juyawa a kai, yawanci a siffar cokali mai yatsu. Manyan cokali na sama da na ƙasa suna da ramuka biyu na homing na kingpin, kuma ana amfani da littafin knockle don ɗora ƙafafun. An haɗa ramuka biyu na ramukan fil a cikin ƙushin hannun a ƙarshen aksali na gaba ta hanyar kingpin, wanda ke ba da damar tayar gaba ta karkatar da kingpin a kusurwa don jagorantar motar. Don rage lalacewa, ana danna bushing na tagulla a cikin ramin fil na ƙushin hannu, kuma ana shafa man shafawa na bushing da man shafawa a cikin bututun da aka ɗora a kan ƙushin hannu. Domin a sa sitiyarin ya zama mai sassauƙa, ana shirya bearings tsakanin ƙananan ƙafafun sitiyarin da ɓangaren dunƙulen hannun gaba. Haka kuma an samar da gasket na daidaitawa tsakanin kunne da ɓangaren dunƙulen hannun sitiyarin don daidaita gibin da ke tsakaninsu.
