Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - Ridiculous fuel mileage
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Old 11-12-2012, 12:14 PM   #27
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Stickier rubber means more traction = more friction = less mileage.

Bigger wheels = heavier (usually) and much worse rotational inertia since the weight in the wheel is further toward the edge = worse mileage.

Just my .02$.
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