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      12-12-2018, 06:24 AM   #16
johnmyster
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Drives: 2011 e92 n52
Join Date: May 2017
Location: Virginia

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Quote:
Originally Posted by driverman View Post
Regarding speedometer error....

I think our speedometers normally read at least 5% too high. If we went with 245/40/17's in the rear, the circumference would be about 1% smaller, which would help reduce the discrepancy.
Wrong direction. You'd need a taller tire to get the speedometer closer. A 26" tire would be 4% taller, and would be pretty close.
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