Quote:
Originally Posted by Blk_07_SI_Sedan
You will still loose power and mpg if you get a larger wheel (even if it is lighter). The sheer size of the wheel also needs to be put into consideration. Think of gears on a bicycle. The larger gears require more effort then the smaller ones
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Now that depends on a lot more than that alone, The larger wheel also effectively makes your gearing taller, so cruising at the same speed (65mph or x speed, whatever) would net you a lower engine RPM theoretically burning less fuel on a level surface.