Igikoresho gitanga buffer kumodoka cyangwa umushoferi mugihe cyo guhangayika.
Imyaka 20 irashize, ibyuma byimbere ninyuma byimodoka byari bikozwe mubikoresho byicyuma. Bashyizweho kashe mu cyuma cya U gifite uburebure bwa mm 3 zirenga. Ubuso bwakorewe hamwe na chrome hanyuma bukazunguruka cyangwa gusudira hamwe hamwe nurumuri rurerure rw'ikadiri. Hamwe niterambere ryinganda zimodoka, bumper yimodoka nkigikoresho cyingenzi cyumutekano nayo iri munzira yo guhanga udushya. Uyu munsi imodoka imbere ninyuma yinyuma usibye gukomeza umurimo wambere wo kurinda, ariko kandi no gukurikirana ubwumvikane nubumwe hamwe nimiterere yumubiri, gukurikirana uburemere bwabyo. Kugirango ugere kuriyi ntego, ibyuma byimbere ninyuma byimodoka bikozwe muri plastiki, bizwi nka bamperi ya pulasitike. Bamperi nigikoresho cyumutekano gikurura kandi cyoroshya ingaruka ziva hanze kandi kirinda imbere ninyuma yumubiri wimodoka. Imyaka 20 irashize, ibyuma byimbere ninyuma byimodoka byari bikozwe mubikoresho byicyuma. Bashyizweho kashe muri U-umuyoboro ufite uburebure burenga 3mm. Ubuso bwakoreshwaga na chrome hanyuma bukazunguruka cyangwa gusudira hamwe na gari ya moshi. Hamwe niterambere ryinganda zimodoka, bumper yimodoka nkigikoresho cyingenzi cyumutekano nayo iri munzira yo guhanga udushya. Uyu munsi imodoka imbere ninyuma yinyuma usibye gukomeza umurimo wambere wo kurinda, ariko kandi no gukurikirana ubwumvikane nubumwe hamwe nimiterere yumubiri, gukurikirana uburemere bwabyo. Kugirango ugere kuriyi ntego, ibyuma byimbere ninyuma byimodoka bikozwe muri plastiki, bizwi nka bamperi. Amashanyarazi ya pulasitike agizwe n'ibice bitatu, nk'isahani yo hanze, ibikoresho byo kwisiga hamwe n'ibiti. Isahani yo hanze n'ibikoresho byo mu bwoko bwa bffer bikozwe muri plastiki, kandi urumuri rukozwe mu rupapuro rukonje rukonje rufite umubyimba wa mm 1.5 kandi rushyirwaho kashe mu cyuma cya U. Isahani yo hanze hamwe nibikoresho byo kwisiga bifatanye kumurongo, bifatanye kumurongo wa gari ya moshi kandi birashobora gukurwaho umwanya uwariwo wose. Ubu bwoko bwa pulasitike ikoresha plastike, ahanini ikoresha urukurikirane rwa polyester hamwe na polypropilene ikurikirana yibikoresho bibiri, ukoresheje uburyo bwo gutera inshinge. Mu mahanga hari kandi ubwoko bwa plastike bwitwa polycarubone ester, kwinjira mububiko bwa alloy, uburyo bwo gushushanya inshinge, gutunganya hanze ya bumper ntabwo bifite imbaraga zikomeye gusa, ariko kandi bifite ibyiza byo gusudira, kandi imikorere yo gutwikira ni nziza, ubwinshi bwibindi byinshi mumodoka. Bumper ya plastike ifite imbaraga, gukomera no gushushanya, uhereye kumutekano, kugongana kwimodoka birashobora kugira uruhare runini, kurinda umubiri wimodoka imbere ninyuma, kubigaragara, birashobora guhuzwa hamwe numubiri mubice, byinjijwemo byose, bifite imitako myiza, bihinduka igice cyingenzi cyimiterere yimodoka.
