Quote:
Originally Posted by PaleMelanesian
Right. 65 vs 70 sidewall almost covers the difference. I always assumed the 14's would have a close-to-accurate speedometer due to the slightly bigger tire.
Are you reading the speedometer mph or odometer miles? They're not always the same.
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I'm reading the speedometer. It seems 2.5 mph HIGHER than actual speed (not percent but a consistent number of miles per hour, regardless of speed). The ODO I tried to calibrate against Google maps and found a 0.2%-0.4% UNDERcount by the ODO, but I think that test hopelessly flawed because the route was very very hilly and only 11 miles long. Later this month I try again with google maps, a good GPS that gauges altitude, and a 69.2 mile route that is fairly flat.