My Ford Bronco was fitted at the factory with
30 inch diameter tires. That means its speedometer is calibrated
for 30 inch diameter tires. I "enhanced" the vehicle
with All Terrain tires that have a 31 inch diameter. How will
this change the speedometer readings? Specifically, assuming the
speedometer was accurate in the first place, what should I make
the speedometer read as I drive with my 31 inch tires so that
the actual speed is 55 mph?One would expect some use of ratios here . . .