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Old 03-30-2009, 07:11 PM   #19
cfiimei
 
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Smaller diameter wheels = lower gearing = lower mileage... right?
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Old 03-30-2009, 08:17 PM   #20
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Quote:
Originally Posted by cfiimei View Post
Smaller diameter wheels = lower gearing = lower mileage... right?
Not quite. In fact... no, not at all.

Smaller diameter wheels are generally lighter, that can help with economy, but otherwise, WHEEL diameter does not matter.

Smaller diameter TIRES will have the same effect as a shorter gear ratio, quicker acceleration, higher revs, lower economy. For better economy, you'd want TALLER tires to lower the engine RPM at highway speeds.
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