Thaum saib rau cov log tsheb tom qab, tsuas muaj 2 hom log koj yuav xav txog: cam khwb cia lossis forged. Qhov sib txawv ntawm 2 lub log no yog nyob rau hauv kev tsim khoom.
Forged rims yog tsim los ntawm cov khoom siv aluminium uas tau rhaub kom tso cov tshuab pa los tsim lub rims. Forged rims tau txais nws lub npe los ntawm cov txheej txheem ntawm lub forging ib daim ntawm txhuas rau hauv cov duab ntawm lub log rims. Cov log cam rau ntawm txhais tes yog tsim los ntawm txhuas uas yog yaj rau hauv cov kua ua, thiab hliv rau hauv pwm.
