Speedo correction for larger tires?
When is it necessary to get a speedo correction for larger tires? I went from a 265/75 to a 285/75 both 16 inch. Would the height even change?
Forum Discussion
One of the pleasures of testifying in court, on speeding cases, speedometer error often was a defense. Lots of things impact a speedometer's accuracy, such as your tires change the speedometer as they wear, as does a change in air pressure. For some people, a 2 to 3 mph error +/- is important, especially when they are pulled over for speeding.
When in doubt, stay with traffic. Or, follow someone with a functioning speedometer, and compare your speedometer at the speeds they are traveling. In the old days, they synchronized watches off of others, works for speedometers too.
Or, you mentioned a recent change in your MPG. Sometimes changes like this are due to change of travel area, Diesel fuel changing from winter to summer grades, then back. Or someone else driving your truck.
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When in doubt, stay with traffic. Or, follow someone with a functioning speedometer, and compare your speedometer at the speeds they are traveling. In the old days, they synchronized watches off of others, works for speedometers too.
Or, you mentioned a recent change in your MPG. Sometimes changes like this are due to change of travel area, Diesel fuel changing from winter to summer grades, then back. Or someone else driving your truck.
b
