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Originally Posted by KevRyd
Drag car tires are huge both in the side-wall and in their width.
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Yes, neither of which is accomplished by 19 inch wheels. The side wall is decreased with 19 inch wheels, decreasing traction. Tires on 19 inch wheels are no wider.
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Heavier wheels do load the suspension, but also distribute weight to the corners which lowers the overall center of gravity.
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No. Heavier wheels do not "load the suspension," they accomplish the opposite; they add unsprung weight; they are
below the suspension.
This is the absolutely worst place for increased weight. The detrimental effects of increased unsprung weight greatly exceeds the problems of adding weight anywhere else in the car. Additionally, heavier wheels add to rotational weight. Heavier wheels are the worst thing one can do for performance.
Similarly, adding weight to a car to lower the center of gravity is a fool's errand; the increased weight greatly offsets any benefit. Again, basic physics.