No, a "South African Spare Tire" isn't a new mixed drink, it's a quick-n-dirty car repair where the driver wraps a length of garden hose around a rim and drives on it like a tire. Some asphalt marring may occur.

(Thanks for the pictures Dylan)

How To Make A South African Spare TireS

How To Make A South African Spare TireS

How To Make A South African Spare TireS

How To Make A South African Spare TireS