Nkuko byavuzwe haruguru, disiki zo guswera zahujwe cyane, zuzuye - uburyo bwo kugabanya kuzenguruka. Ibyiza byabo birenze ibi. Mugihe ibice n'imizigo itwarwa na drives nini kandi ntoya yo guswera irashobora gutandukana inshuro mirongo, ibipimo byabo, cyane cyane ibipimo bya axial ya gari ya moshi, birasa. Ibi byoroshya gusibanganya imiterere ihuza ibice mukwirakwiza, bityo bikagabanya ubunini bwibikoresho bya mashini.
Ikigeretse kuri ibyo, ibyuma byombi hamwe ninyo zikoresha ibyuma byangiza, bitewe nubunini bugaragara hagati yikinyabiziga no gutwara ibinyabiziga, byoroshye kugera ku kigero kinini cyoherejwe, igikorwa kitagerwaho byoroshye nubundi bwoko bwinshi bwihuta bwihuta.
