Forum Discussion

Chuck_Sorensen's avatar
Chuck_Sorensen
Explorer
Dec 12, 2014

Larger Diameter Tires - Odometer / Speedometer

When we bought our van, its stock tires resulted in the speedometer reading high. After replacing the tires with the next size larger tire, the speed indication was dead on. I assumed that the odomete...
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bsinmich's avatar
bsinmich
Explorer
Dec 12, 2014
I like having my GPS. It gives more accurate speeds and is easily switch to kilometers when I go to Canada. A normal speedometer will vary a few mph over normal tire wear. The circumference of any given tire will be less when the tread is worn down than when it was new. GPS doesn't count tire rotation to determine anything.

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