Quote:
Originally Posted by gumby
Tire width is probably more important, unless you get really heavy rims. The standard LRR tires on our cars have a quite narrow tire-patch. The wider the tire-patch is that meets the road, the more resistance there is. THAT lowers MPG.
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I would tend to disagree, unless in an extreme case. The inertia (i.e. mass) of the wheels are probably the biggest factor in the role the wheels play in energy requirements.