Quote:
Originally Posted by KJSatz
Does your odo know the tires are a different size?
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Ya, are you calculating the fact that when you put smaller tires on, your car is not going as many miles as it thinks it is. In your case, you are losing 2.4% of the miles on the odo.
Tire size calculator
Strange thing is that most people get better mileage by installing LARGER tires to decrease RPM.