Mabhampa ane mabasa ekuchengetedza kuchengetedza, kushongedza kwemotokari, uye kuvandudzwa kweaerodynamic hunhu hwemotokari.Kubva pakuona kwekuchengetedza, kana tsaona yakaderera-yekudhumhana ikaitika, mota inogona kuita basa rekuchengetedza kudzivirira kumberi uye kumashure kwemota;inogona kuita basa rakati mukudzivirira vanofamba netsoka muchiitiko chetsaona nevanofamba netsoka.Maererano nechitarisiko, inoshongedza uye yava chikamu chakakosha chekushongedza chitarisiko chemotokari;panguva imwecheteyo, bumper yemotokari inewo imwe aerodynamic effect.
Panguva imwecheteyo, kuti kuderedze kukuvadzwa kwevari mukati memotokari kana pakaitika tsaona yekukonana, gonhi regonhi rinowanzoiswa pamotokari kuti riwedzere simba rinopesana nekuputika kwegonhi remotokari.Iyi nzira inoshanda, iri nyore, uye ine shanduko shoma kune chimiro chemuviri, uye yakashandiswa zvakanyanya.Kuiswa kwegonhi bhampa ndeyekuisa akati wandei-akasimba simbi matanda akatwasuka kana oblique mugonhi remusuwo wega wega, iro rinotora basa rekumberi nekumashure mabumpers emota, kuitira kuti mota yese ive nemabumpers "kurinda" kumberi, kumashure, kuruboshwe, nekurudyi kwemotokari., kuumba "rusvingo rwemhangura", kuitira kuti vagari vemotokari vave nepamusoro pekuchengetedza nzvimbo.Ehe, kuisa rudzi urwu rwegonhi bumper pasina mubvunzo kuchawedzera mamwe mari kune vanogadzira mota, asi kune vanogara mumotokari, kuchengetedzwa uye pfungwa yekuchengeteka ichawedzera zvakanyanya.
