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Going back to this thread's title question: "Tire sidewall height vs rolling resistance?"
With a given wheel diameter for a car and all other things being equal, for less rolling resistance is it better to have more rubber in the tire's sidewall with a smaller metal hub/rim, or is it better to have less rubber in the tire's sidewall with a larger metal hub/rim?
Stated another way, for lower rolling resistance is it better to achieve a 26-inch-diameter wheel with a 16-inch metal hub/rim or an 18-inch metal hub/rim?
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