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you've got it backwards.... (archive)
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Posted by ben keyes on February 04, 2001 at 21:45:41:

In Reply to: And don't forget..... posted by Hatem Eldoronki ///M on February 04, 2001 at 17:57:52:


...that bigger wheels means that your odometer is gonna show slightly more miles than what you actually do! But who cares! Just feel good.

actually with bigger wheels (larger circumference) the wheels are going to take the car further with each rotation than they did with the stock size, so the odometer will show fewer miles with the larger tires.

the larger tire/wheel package will decrease the speed shown on the speedometer relative to the actual speed of the car, so the other poster's comment about the speedo no reading closer to actual speed (it reads high stock) is also correct.

Ben Keyes
'99 M coupe - slightly larger rear snow tires (225/45-17) which provides 1% higher rear end - 100mph indicated is in theory equal to
101mph actual.

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