heavy 19 rims

well just to debate.....so you are saying that my stock 17 / 255 / 45 rear and 17 / 205 / 50 front would be faster then the car sitting on 19 / 275 / 30 rear and 19 / 235 / 35. lets just say that the rims were the exact same weight. i'm not sure that it would make a big difference.....unless i take the car to a track....which a boxster might not be my first choice of car to ruin on a track.....i would not suggest my set up for racing....but still pretty dam fast....raced a 350z and the car kept up, if not faster.......................