Impande ebyiri zizenguruka impeta ya shaft
Impeta igumana impeta ni impeta igumya gutwi yakozwe no kuzunguruka insinga. Ntabwo ifite imitsi, nta burrs, kandi ntishobora kubangamira ibice. Bitandukanye na gakondo yo gushiraho kashe, nta myanda izabyara. Nyuma yo kuvura ubushyuhe no kuvura hejuru, ifite elastique nziza no gukomera. Kabiri-igumana impeta kuri shafts irakwiriye cyane cyane kuburemere buremereye buremereye.