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Originally Posted by tsdrummerboy
I`m puzzled,I just put 37`s on and my MPH showes 5 mph faster on the speedo and what`s showing on my GPS.Has anyone else have this problem?
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larger tire will make the speedometer read to fast you need to have it recalibrated
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Actually, it would be just the opposite. A taller tire will mean you are really going faster than the speedometer reads. The speedometer gets its information from revolutions in the drivetrain, not ground covered. So, if your drivetrain is turning at a certain speed that is read as 50 MPH with stock tires, taller tires will cover more ground turning at the same speed, thus making you go faster than it says.