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I just read the 5 most fuel efficient tire page, The smallest tire on the list was a 14, and it was the best. also listed was 15,16, and 17 inch tires. again i dont know about comparing just LRR facts. That is why i thought it would a good test for real world results. Where the engine rpms stay equal, but tires sizes change. (wow, that was the first post, and we still havnt got around to this question, we are still on tangents.)
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