I want to get a new set of rims for my cobalt, but does that mean I will need to purchase new tires also? If it's not a must do, is it still something recommended?

 

umm if you get the same size you can re-use your stock tires but you'd have to take them off then get them mounted and balanced, its probably easier just to get tires with the new wheels and that way if you ever need to sell them you don't have any trouble getting the stocks back on