with a car this slow, it is almost a guarantee that the advantage in mechanical grip gained from tire is more advantageous than whatever you are trying to accomplish with aero. downforce is drag no matter how you slice it. the net result might not always show that but thats because nobody is talking about lift. once you realize that an f1 car has a cd of 1.5-2.5 and a prius has a cd of .25, it becomes a little more apparent where the priorities are in performance cars.
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