
Izixubi zeribhoni ezinesivinini esiphansi, ezinesitsha esimise okuka-U nesingenazo izindawo ezingafinyeleleki, ezingu-400 kuya ku-6000 amalitha, zokuxuba ngokulinganayo ngaphandle kokulimaza impahla.
Izixubi zingakhiwa ngezinto ezihlukahlukene ngokwe-oda. Ngenxa yokuthi ukuminyana kwenqwaba kuyahlukahluka ngokwemboni, izicaciso ezingenhla zingezamamodeli avamile; izinto eziminyene kakhulu zidinga amandla enjini nawokufudumeza aphakeme ngokulinganayo.