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Your cart is empty.Put the finishing touch on your lifted vehicle with Rough Country's Speedometer Calibration Device! This easy-to-use Speedometer Calibrator helps you quickly and easily reprogram your vehicles speedometer to match the output of your larger tires. Your vehicle's 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. This plug and play device connects directly to your vehicles Diagnostic Link Connector Port and in just a few short minutes your speedometer reads true again! Rough Country's Speedometer Calibration Devices don't just simply change your in-dash readout, they 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! This device also includes a function to reset the speedometer back to stock prior to servicing the vehicle. Includes a 1-Year Warranty.
Matthewenolan
Reviewed in the United States on April 4, 2025
I bought this to fix my speedometer on my Tundra ( got a speeding ticket), it corrected the issue. Did not take long to program or install. Super happy that I no longer need to do funky math to guess my speed. I’m running 37s on my truck and it had me running 9 miles over.
James D.
Reviewed in the United States on May 27, 2024
Fixed my speedometer. When I put 33s on my truck. Simple 20min instal.
Wade Church
Reviewed in the United States on March 23, 2024
Didn't work on my 2016 Tundra. Multiple attempts at programming with no change to the speedometer. Last attempt at tuning I set the speedometer value at 70 and GPS value at 300 and still no charge.
James Cilino
Reviewed in the United States on October 20, 2024
What a difference, after putting larger tires on, my mpg was registered really bad and truck was shifting different.Easily downloaded new tire size and very easy install and shift points went back to normal and mpg also back. Well worth the money!
J. Williams
Reviewed in the United States on September 23, 2023
Bought this and installed on my '18 Tundra after a speeding ticket. Took pictures of install to court and pleaded improper equipment. Can't say for sure if my spedometer is more accurate but they did reduce my ticket. Not legal advice, just my experience. One con was the program I had to dowload on my computer seemed a little sketchy, no issues with it but it looked like a program I had to think twice about running on my computer.
Mike
Reviewed in the United States on September 11, 2023
Easy enough to install but I couldn’t get the first one to change my speedometer. It didn’t matter which parameters I programmed in the speedometer never budged. Rough country sent me a replacement but the replacement wouldn’t connect to their programming software so I couldn’t get either of the two units to work for me. Another issue I noticed was while the unit was installed my key fob remote stopped working. I replaced the batteries at first thinking the remote was dead but as soon as I removed the unit from my instrument cluster my key fobs started working again. Just something to be aware of. Rough county was easy enough to deal with but unfortunately my speedometer just isn’t going to be accurate.
Debo
Reviewed in the United States on June 19, 2023
Don’t waste money on the Hypertech version. This one even uses the Hypertech software. Exact same device. Only way to calibrate speed on a tundra. These work great!
Customer
Reviewed in the United States on April 12, 2023
Installed and left the usb near the fuse location so I have the ability to connect a laptop. Took a few drives to adjust the data but I have my truck speed 100% on sync with matching GPS speed. This improved the shifting pattern of the truck and also helped with a custom tune that was installed after. Worth it for sure if your running 37” wheels with 5.29 Nitro Gears
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