Rough Country Speedometer Calibrators

Your vehicles computer is designed to track the speed based on your stock tire height. When upgrading to larger tires, there will be a discrepancy between your actual speed and the readout on your speedometer. Rough Country speedometer calibration devices are easy to use to help you quickly reprogram your vehicles speedometer to match the output of your larger tires. These plug-and-play devices connect directly to your vehicle's diagnostic link connector port and in just a few short minutes your speedometer reads true again. Plus, they not only change your in-dash readout, but they also update your vehicles ECM, ensuring accurate shift points and proper electronic stability control. Finally, you can get an affordable and accurate speedometer calibration with an easy and intuitive setup process, thanks to Rough Country. Choose the device designed for your vehicle. Show Less