All of the above is true, but all other things (wheel/tire mfg, weight distribution/total, etc) being equal, if you kept the same sidewall height and dropped back to an 18" wheel, the car would perform even better.
The only performance reason to intentionally upsize wheels is to fit bigger brake rotors. You can run lighter wheels and shorter sidewalls in any diameter, and the smaller you get the outside diameter the better it is for acceleration (the gearing effect mentioned at length two posts up).
|