Urusenda rwicyuma rusanzwe rukozwe mubyuma bya karubone, kandi hejuru harashyushye cyane, bishobora kwirinda okiside.Irashobora kandi kuba ikozwe mubyuma.Gusya ibyuma bifite umwuka, gucana, gukwirakwiza ubushyuhe, anti-skid, kwirinda-guturika nibindi bintu.