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Subject:  Re: Electric car monies Date:  2/5/2013  10:33 PM
Author:  qazulight Number:  40677 of 90610

Seriously? Worn out tires have a smaller circumference. That means they go a smaller distance for each engine revolution. That means lower mpg by my estimation.

The diameter of the tires doesn't actually change the fuel mileage much. It is a measurement error as the odometer measures revolutions of the tire and calculates the distance/vs fuel used. A smaller tire shows an increased distance as the tire rotates more times per mile with a smaller radius than a larger tire.

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