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Speedometer Calibrators

Speedometer calibrators are a must have for anyone who's installed bigger wheels and tires - or even smaller wheels and tires - or made a change to differential to a different gear ratio. A speedometer calibrator updates your truck's ECM to take into account the different size of tires and/or differential, and makes sure your speedometer and odometer are reading correctly. Save yourself some unnecessary speeding tickets, and inflated miles, and get a speedometer calibrator from RealTruck.