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I just bought Defenders for the CX-5 to replace the balding OEM Yokohamas on 17" wheels. I thought they were expensive until I looked at the OEMs running $200/per. My mileage has been down almost 10% over previous year because I'm driving mostly city now and needed less grill block to keep h2o temps down below 200. Aero isn't helping much in this abysmal traffic. Really tried to find a tall skinny tire to help highway gearing without adding too much rotating mass. That was a virtual impossibility. I'm aired to 50 psi (same as OEM tires) and surprised they are still not harsh. Put the grill blocks back on last weekend as I need outside temps down in the lower 50s and below to be 100 blocked. If I had needed AC to defog I probably wouldn't have seen a 1 mpg improvement on my daily commute. It seems to be a wash over OEM. I also haven't recalc'd the affect of circumference changes on odometer.
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