Trailer dauke da kariyaƙwalƙolin ƙarfe ne da aka ɗora a cikin bazara waɗanda ke maye gurbin ƙurar ƙurar da ke kan tashar tirela. Wannan lamari ne musamman ga tirelolin kwale-kwale da ke shiga cikin ruwa lokacin da aka harba jirgin.

Masu kariyar suna kiyaye ruwa, datti ko dattin hanya daga wuraren tarho da ƙugiya, koda lokacin da aka nutsar da su. Masu kariyar tirela suna da maɓuɓɓugar ruwa a ciki don ci gaba da matsa lamba akan masu ɗaukar tirela a kowane yanayi, rigar ko bushe. Wannan yana kiyaye gurɓataccen abu yayin da ake ci gaba da jan da maiko a ciki, yana tsawaita rayuwar ɗigon ja da rage buƙatar sake tattarawa ko maye gurbinsu kowace shekara ko biyu. Busassun bears ko ƙazanta suna lalacewa kan lokaci, suna hana wuraren juyawa daga sassautawa.

Bugu da ƙari ga masu kariyar da aka ɗora a cikin bazara, ƙarin kayan aikin kariya na iya ƙara rufe belin a kan ɓacin hanya. Kamar murfin kariya akan hancin motar motsa jiki, waɗannan ƙarin iyakoki ana kiran su "bras." Suna da arha kuma suna da sauƙin shigarwa akan masu kariya masu ɗaukar nauyi.

Manufar masu kariyar tirela daidai ne a cikin sunan: Suna kare bearings ta hanyar ajiye barbashi na waje da ruwa. Amma me yasa za ku biya ƙarin kayan aikin ja idan bearings suna da arha kuma mai sauƙin maye gurbin?

Idan ba tare da wannan kayan aikin kariya ba, kuna buƙatar maye gurbin ɗigon ja sau ɗaya sau ɗaya a shekara. Wannan zai kashe kusan $20 don cikakken kit, ba tare da haɗa lokacinku ba (idan kuna da amfani tare da cibiyoyi da bearings) ko farashin aiki a shagon kanikanci na gida. Don haka masu karewa suna da matuƙar mahimmanci.

Ga abin da muke da shi a ƙasa, ciki har da1.78”kuma1.98”,da kyau a duba, na gode sosai.