Fekthering ea rona ea ho etsa ente, re etsa li-fender tsa trailer tsa polasetiki tse tšoarellang tse etselitsoeng matla le botsitso. E entsoe ka thepa ea boleng bo phahameng, e thibelang tšusumetso, li-fenders tsa rona li fana ka tšireletso e phahameng khahlanong le litšila, seretse le tšenyo ea litsela, ho netefatsa ts'ebetso e tšepahalang maemong 'ohle.
Ka boholo bo ikhethileng, libopeho le liphetho, re fana ka li-fender tse etselitsoeng ho lekana mefuta e fapaneng ea literekere. Re tšepe hore re tla hlahisa li-fender tsa polasetiki tse bolokang chelete e ngata, tse entsoeng ka mokhoa o nepahetseng tse kopanyang nako e telele le moralo o motle, o sebetsang ho fihlela litlhoko tsa hau tse khethehileng.