I-bumper sisixhobo sokhuseleko esifunxa kwaye sinciphise impembelelo yangaphandle kwaye sikhusele umphambili nomva womzimba wemoto. Kwiminyaka engamashumi amabini eyadlulayo, ii-bumpers zangaphambili nangasemva zeemoto zazenziwe kakhulu ngezinto zesinyithi. Zazinyathelwe kwintsimbi ye-U-channel enobukhulu obungaphezulu kwe-3mm. Umphezulu wawuphathwa nge-chrome kwaye ufakwe i-riveted okanye welded kunye ne-frame rail. Ngophuhliso lweshishini leemoto, i-bumper yemoto njengesixhobo sokhuseleko esibalulekileyo ikwasendleleni yokuvelisa izinto ezintsha. Ii-bumpers zangaphambili nangasemva zeemoto zanamhlanje ukongeza ekugcineni umsebenzi wokuqala wokukhusela, kodwa kunye nokufuna ukuvumelana kunye nobunye nomzimba, ukufuna ukukhanya kwayo. Ukufezekisa le njongo, ii-bumpers zangaphambili nangasemva zeemoto zenziwe ngeplastiki, ezaziwa ngokuba zii-bumpers zeplastiki. I-bumper yeplastiki yenziwe ngamacandelo amathathu, njengepleyiti yangaphandle, izinto zokuthambisa kunye nomqadi. Ipleyiti yangaphandle kunye nezinto ze-buffer zenziwe ngeplastiki, kwaye umqadi wenziwe ngeshiti eqengqelekayo ebandayo enobukhulu obumalunga ne-1.5 mm kwaye inyathelwe kwi-groove efana ne-U; Ipleyiti yangaphandle kunye nezinto zokuthambisa zinamathele kumqadi, onamathele kwi-screw yerail yesakhelo kwaye unokususwa nangaliphi na ixesha. Olu hlobo lwe-bumper yeplastiki lusebenzisa iplastiki, ngokuyintloko lusebenzisa uthotho lwe-polyester kunye nothotho lwe-polypropylene lwezinto ezimbini, kusetyenziswa indlela yokubumba injection. Kukwakho nohlobo lweplastiki olubizwa ngokuba yi-polycarbon ester, ukungena kwi-alloy composition, indlela yokubumba i-alloy injection, ukucutshungulwa ngaphandle kwe-bumper akupheleli nje ekubeni nokuqina okuphezulu, kodwa kukwaneenzuzo zokuwelda, kwaye ukusebenza kwe-coating kulungile, inani elininzi ngakumbi emotweni. I-bumper yeplastiki inamandla, ukuqina kunye nokuhombisa, ukusuka kwindawo yokhuseleko, ukungqubana kwemoto kunokudlala indima ye-buffer, ukukhusela umzimba wemoto wangaphambili nowangasemva, ukusuka kwimbonakalo, inokudityaniswa ngokwendalo nomzimba kwisiqwenga, idityaniswe kwinto yonke, inomhombiso omhle, ibe yinxalenye ebalulekileyo yembonakalo yemoto yokuhombisa.
