A.ibiziga by'imodokani ishusho ya barrale, hagati-igizwe nicyuma igice cyipine gishyigikira ipine imbere yumwirondoro. Azwi kandi nka rims, rims, ibiziga, inzogera zipine. Hub ukurikije diameter, ubugari, uburyo bwo kubumba, ubwoko bwibikoresho bitandukanye. Ingano ya Hub mubyukuri ni diameter ya hub, dukunze kumva abantu bavuga ko hub 15-santimetero, 16-santimetero 16 nkiyi mvugo, muri yo 15,16 bivuga ubunini bwa hub. Mubisanzwe mumodoka, niba ubunini bwibiziga binini ari binini kandi igipimo kinini cyipine ni kinini, birashobora kugira ingaruka nziza cyane mubyerekezo, kandi umutekano wo kugenzura ibinyabiziga nawo uziyongera, ariko rero harahari ibibazo byiyongereye byo kongera lisansi. Hano haribintu byinshi byingenzi muburyo bwo gutunganya ibiziga, mugutunganya bigomba kwitondera kugenzura ibipimo murwego rwumvikana, bitabaye ibyo bizagira ingaruka kumiterere no mumikorere yaIkiziga Cyimodoka.