Txhawm rau txheeb xyuas cov khoom siv hluav taws xob ib nrab, nws tseem ceeb heev uas yuav tsum nco ntsoov tias cov pawm no feem ntau muaj qhov sib txhuam qis dua, feem ntau nyob ib puag ncig 0.38, thiab lub neej luv dua. Feem ntau cov tsheb tau nruab nrog hom nres nres thaum lawv tawm hauv lub hoobkas, vim lawv yog cov kev xaiv pheej yig tshaj plaws. Txawm li cas los xij, qee cov tuam txhab tsim cov khoom siv no nrog kev sib txhuam coefficient ntau dua.
Nres pads feem ntau yog tsim los ntawm cov hlau thaub qab phaj, ib txheej nplaum nplaum, thiab kev sib txhuam thaiv. Cov txheej txheej rwb thaiv tsev yog ua los ntawm cov ntaub ntawv uas tsis ua cua sov, ua haujlwm rau lub hom phiaj ntawm kev rwb thaiv tsev kub. Cov kev sib txhuam thaiv muaj cov khoom sib txhuam thiab cov nplaum, uas tsim kev sib txhuam thaum nias rau ntawm lub nres nres lossis lub nruas thaum nres, yog li ua kom qeeb lossis nres tsheb.
Thaum lub thickness ntawm lub ncoo nres yog pom kev txo qis mus txog li ib feem peb ntawm nws cov thawj thickness (kwv yees li 0.5 cm), nws yog lub sij hawm rau tus tswv kom nce kev soj ntsuam zaus thiab npaj los hloov lawv. Semi-metallic brake pads feem ntau pib nrog ib lub thickness ntawm ib ncig ntawm 1.5 cm thiab maj mam hnav thaum lawv siv.
