Kukhala ndi camber kumatanthauzanso kuti tayala lakunja silitenthedwa kwambiri podutsa.Popanda camber, tayala limatha kutambasula khoma la m'mbali panjira, kuwononga mphira ndikupangitsa kuti zisawonongeke.Mfundo yaikulu ndi yakuti gudumu likhale lokhazikika bwino pamene likuzungulira, osati pamene likuyenda mowongoka.