Ingaphambili lithola amandla okutholwa, asatshalaliswa yi-bumper yangaphambili emabhokisini amuncwa amandla ezinhlangothini zombili bese edluliselwa esihlalini esingaphambili kwesokunxele nakwesokunxele, bese kulo lonke isakhiwo somzimba.
Isengemuva siyathinteka ngamandla ethonya, futhi amandla ethonya adluliswa yi-bumper engemuva ebhokisini lokutholwa kwamandla ezinhlangothini zombili, ohlangothini lwesobunxele nakwesokudla, bese ziye kwezinye izakhiwo zomzimba.
Ama-bumpers anamandla ama-bumplers angabhekana nomthelela, ngenkathi umthelela onamandla amakhulu we-bumpers edlala indima yokudlulisela, ukuhlakazeka kanye nokufaka ezinye izinhlaka zomzimba, bese ekugcineni udluliselwe kwamanye izakhiwo zomzimba ukuze amelane.
IMelika ayibheki bumper njengokucushwa kwezokuphepha: IIHS eMelika ayibheki bumper njengokucushwa kwezokuphepha, kepha njengesengezo sokwehlisa ukulahlekelwa kokushayisana okusheshayo. Ngakho-ke, ukuhlolwa kwe-bumper nakho kususelwa emcabangweni wokuthi unganciphisa kanjani izindleko zokulahlekelwa kanye nesondlo. Kunezinhlobo ezine ze-IIHS bumper Crash Test Test, okuyizivivinyo zangaphambili ezingemuva (ijubane 10km / h) nokuhlolwa okungokoqobo okuphambili (isivinini 5km / h).
