Nkigice cya sisitemu ya rack-na-pinion, icyerekezo ni umurongo ugereranije nu murongo wimbere ugenda ibumoso cyangwa iburyo iyo ibizunguruka byahinduwe, bigamije ibiziga byimbere muburyo bwiza.Pinion nigikoresho gito kumpera yimodoka yimodoka ikora rack.