I noticed a 1-2 mph drop when I replaced the Yokos <the car came with, worn out> with these cheap bottom of the line out-of-round Kuhmo tires. Then I realized a 3mpg improvement when I replaced the Kuhmos <after only 10k miles> with Michelins. Neither tire sets were LRR, but the Michelins are rated as a 60k tire for my Metro>
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