Quote:
Originally Posted by WilyB
That a humongous 5.97% increase in diameter for the front wheels and 4.92% for the rear ones: your speedo will be way off!
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Willy, didn't see your reply earlier. Obviously you are using some chart that shows tire sizes based on the casing numbers. THOSE ARE B.S. The facts are realized when tires are measured. The O.E. fronts on mine were larger diameter than the rears and the Michelins I installed were 4% larger than the O.E. rears.
And since most car manufacturers don't install accurate gauges I checked my speedo by GPS and odometer by going a minimum of 10 miles on interstates and doing it many times. Now I find the speedo is dead on and the odometer reads 5.6% low.