Ikigereranyo cyihuta cyibikoresho bigororotse bigenda bitandukana kubisabwa.Igenwa numubare w amenyo kuri buri bikoresho kandi ubarwa ukoresheje formula ikurikira: Ikigereranyo = Umubare w amenyo kubikoresho byo gutwara / Umubare w amenyo kubikoresho bitwara.
Ikigereranyo gikunze kugaragara kubikoresho bigororotse ni 1: 1, 2: 1, 3: 2 na 4: 3.Ariko, ibindi bipimo birashobora gukoreshwa bitewe nibisabwa byihariye.Mubisanzwe, ibipimo byibikoresho byo hasi bikoreshwa murwego rwo hejuru rwa torque kandi ibipimo byo hejuru byifashishwa muburyo bwihuse.