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Howie (not verified)    October 7, 2014 - 9:46PM

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I don't think there is a definitive answer to the wheels dilemma.

For sure, the smaller tires and steel whells of Eco Base have smaller mass together than the bigger tires and alloys of the Eco Plus/Premium, giving the first one a 2 mpg advantage over the latter (EPA). That says a lot about the hype toward bigger wheels VS alleged quest in fuel efficiency.

Would alloys (or even smaller 14'' wheels !) improve the efficiency of the Eco Base ? Maybe, but not all alloys are equals and some end up actually weighting more than steel... So it is not neccessarly true to assume a car will feel slightly more planted and less fuel efficient with steelies and slightly more agile and more fuel efficient with alloys.

I guess Toyota went for a compormise between cost, efficiency and comfort here.

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