ʻO ka lau he uhi (he ʻāpana ʻāpana hapa pōʻai ma luna o ka huila) ma luna o nā kaʻa kaʻa a me nā kaʻa kaʻa ʻole, e like me ka inoa i hōʻike ʻia, uhi ʻia ka ʻili waho o nā kaʻa a me nā kaʻa ʻole. Ma ka laina me ka wai hoʻoikaika kino, e hoʻemi i ke koena o ka makani, e holo mālie ke kaʻa.
Kapa ʻia ka papa lau he fender (i kapa ʻia no ke ʻano a me ke kūlana o kēia ʻāpana o ke kino kaʻa kahiko e like me ka ʻēheu manu). Aia nā papa lau ma waho o ke kino o ka huila. ʻO ka hana e hōʻemi i ka coefficient pale makani e like me ka dynamics wai, i holo mālie ke kaʻa. Wahi a ke kūlana hoʻonohonoho, hiki ke hoʻokaʻawale ʻia i ka pā lau mua a me ka pā lau hope. Hoʻokomo ʻia ka pā lau mua ma luna o ka huila mua. Ma muli o ka hana hoʻokele o ka huila mua, pono ia e hōʻoia i ka palena palena kiʻekiʻe ke holo ka huila mua. ʻAʻole ka lau hope mai ka hoʻololi ʻana o ka huila, akā no nā kumu aerodynamic, ʻo ka lau hope he poʻo pio iki e kū ana i waho.
ʻO ka lua, hiki i ka papa lau mua ke hana i ke kaʻa kaʻa, pale i ka huila i ʻōwili ʻia i ke one, ʻōpala i ka lepo i lalo o ke kaʻa, hoʻemi i ka pōʻino o ka chassis a me ka corrosion. No laila, pono nā mea i hoʻohana ʻia no ka pale ʻana i ka wā a me ka processability molding maikaʻi. ʻO ka pale mua o nā kaʻa he nui i hana ʻia i nā mea plastik me kahi elasticity, i loaʻa iā ia kahi cushioning a ʻoi aku ka palekana.
