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How'd you get those #'s?
Embarrass me if you will. My calc's are:
225x2x.5=225mm/25.4=8.86".
215x2x.55=236.5mm/9.31".
8.86/9.31=0.95 or about 5% change in diameter.
9.31-8.86=0.45"x3.17=1.43"/revolution. So what the hell am I saying? I think it's a 5% change in circumference so 60mph on the speedo is a real 57mph. Maybe my long division became wrong division somewhere.
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