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I will restate my question just for u guys. If you had a 12 inch tire with a total diameter of 20 inchs and a 14 inch tire with a total diameter of 24 inches and the car with 12 inch tires had a rpm of 3000 and the 14 inch tire had a rpm of 3200, which would get better milage. everything else being the same. How about if both cars engines turned at the same rpms
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