In my opinion, from having many many sets of wheels on my aveo, I'd go with a 16"x7", with a 205/40/16 tire. It'll give you ample performance, it'll look a hell of a lot better than the stock ones and won't be too big or too little for the car! Here's the new wheels I've got on the way for a rally in a couple weeks. ROTA Wheel Slipstream 16x7 (4x100+40mm, 67.1 Hub)|Rota Racing Wheel