Igikorwa nyamukuru cyibiziga bya hub ni ugutwara umutwaro kandi ugatanga ubuyobozi nyabwo bwo kuzenguruka hub. Nigice cyingenzi cyane gishobora kwihanganira umutwaro wa radiyo nu mutwaro wa axial. Imodoka gakondo yimodoka yimodoka igizwe nibice bibiri byimodoka. Kwishyiriraho, gusiga, gufunga no guhindura imikinire byose bikorwa mumurongo wimodoka.