Faifan birki, a taƙaice, faranti ne mai zagaye wanda ke juyawa lokacin da motar ke motsi. Katakon birki yana riƙe faifan birki kuma yana samar da ƙarfin birki. Lokacin da aka danna birki, yana riƙe faifan birki don rage gudu ko tsayawa. Faifan birki sun fi birki kyau kuma sun fi sauƙin kulawa fiye da birkin drum.
Akwai birkin diski da birkin drum da birkin iska, tsohuwar mota tana da faifan gaba da yawa bayan drum. Yawancin motocin suna da birkin diski a gaba da baya. Saboda birkin diski ya fi birkin drum zafi, a yanayin birkin sauri mai sauri, ba shi da sauƙi a samar da ruɓewar zafi, don haka tasirin birkinsa mai sauri yana da kyau. Amma a cikin birkin sanyi mai ƙarancin gudu, tasirin birkin bai yi kyau kamar birkin drum ba. Farashin ya fi tsada fiye da birkin drum. Motoci da yawa na manya suna amfani da birkin gabaɗaya, kuma motocin yau da kullun suna amfani da gangunan diski na gaba, kuma ƙarancin gudu, kuma buƙatar dakatar da babban motar, bas, har yanzu suna amfani da birkin drum.
Birkin ganga an rufe shi kuma an yi masa siffar ganga. Akwai kuma tukwanen birki da yawa a China. Yana juyawa lokacin da kake tuƙi. Akwai takalman birki masu lanƙwasa ko rabin zagaye da aka gyara a cikin birkin ganga. Lokacin taka birki, za a miƙe takalman birki biyu a ƙarƙashin aikin silinda tayoyin birki, kuma takalman birki za su shafa a bangon ciki na gangar birki don rage gudu ko tsayawa.
