Ƙaƙƙarfan Dabarun yana nufin ɓangaren da aka shigar da gatari a tsakiyar dabaran. Abu ne mai mahimmanci wanda ke haɗa drum ɗin birki (ko faifan birki), diskin dabaran, da rabin axle. An sanye shi da bearings a kan bututun shaft ko mujallar tuƙi. Idan wani abu mai wuya ya toshe saman gefen ƙafar ƙafa ba da gangan ba, zai iya haifar da bayyanar gefen ƙafar mara kyau. A tsawon lokaci, lalatawar saman da iskar shaka na sassan da aka lalace na gefen dabaran na iya shafar aikin sa. Idan abin hawa yana girgiza yayin tuƙi, ko kuma idan babu matsala a ƙananan gudu amma akwai jin girgiza yayin tuki a cikin babban gudu, yana iya zama matsala tare da tashar motar. A lokacin da za a duba matsalar da aka samu matsala, sai a ware takin daga taya, a cire motar daga jiki, a cire tayal don ganin ko akwai nakasu, karaya, gibi, hakora, da dai sauransu. Idan akwai wata matsala, sai a gyara su ko a maye gurbinsu a wani kantin gyaran ƙwararru.