Ikadiri yimbere yerekana inkunga ihamye ya bumper shell, kandi ikadiri yimbere nayo ni anti-kugongana. Nigikoresho gikoreshwa mukugabanya kwinjiza ingufu zo kugongana mugihe ikinyabiziga cyagonganye, kandi gifite ingaruka zikomeye zo kurinda ikinyabiziga.
Imbere ya bamperi igizwe nigiti kinini, agasanduku gakurura ingufu, hamwe nisahani yimodoka ihuza imodoka. Byombi urumuri runini hamwe nagasanduku gakurura ingufu birashobora gukuramo neza imbaraga zo kugongana mugihe habaye impanuka yihuse yikinyabiziga kandi bikagabanya kwangirika kwumubiri muremure watewe ningufu. Kubwibyo, ikinyabiziga kigomba kuba gifite icyuma gikingira ikinyabiziga kandi kikanarinda umutekano w’abari mu modoka.
Inshuti zimenyereye imodoka zizi ko bumper skeleton na bumper ari ibintu bibiri bitandukanye. Barasa kandi bakora bitandukanye bitewe nurugero. Bumper yashyizwe kuri skeleton, byombi ntabwo ari ikintu kimwe, ahubwo ni ibintu bibiri.
Bumper skeleton nigikoresho cyumutekano cyingirakamaro kumodoka. Bumper skeleton igabanijwemo imbere, imbere hagati na bamperi yinyuma. Ikadiri yimbere imbere ikubiyemo umurongo wimbere wimbere, umurongo wiburyo wikibanza cyimbere, igice cyibumoso cyimbere yimbere, hamwe na bamperi yimbere. Byose bikoreshwa mugushigikira inteko yimbere.
