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[bobolinko]

Originally Posted by spokybob

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Which is it?

Dude,
You're absolutely correct. I used a wrong tire size in the calculations, it was for someone else in my office at the time, and got the two transposed. The correct calculation (as you suspected) is:

When speedometer reads 60mph (96.6km/h) actual speed will be 61.1mph (98.4km/h): 1.8% faster

Thanks for pointing that out... I had to go back to read what I posted when you said the above quote.