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Your cart is empty.When installing tires that are larger or smaller than original equipment tires, and/or installing a ring and pinion gear set with a different rear gear ratio, the Speedometer Calibrator allows you to correct speedometer readings. The vehicle’s computer calculates your vehicle’s speed based on the diameter of the stock tires. If you’ve installed taller or shorter tires, or changed the rear gear ratio, the vehicle’s computer doesn’t know how fast your vehicle is going. As a result, the speedometer readings will not be accurate (as required by law). Using the USB cable connect the In-line Speedometer Calibrator Module to your PC and enter the new tire height and/or rear gear ratio. Next, disconnect the factory connector to the instrument cluster (behind the dash), snap in the Speedometer Calibrator Module, reconnect the cluster, and you’re done! In a matter of minutes, you can accurately correct your speedometer readings.
chad777
August 23, 2025
This is a relatively easy install. I used it on my 21 F150. You have to pull a lot of the dash part. That was a little stressful even though I’ve done these things before. You will need a trim tool. It went well and it works great. I just hate tearing new trucks apart. had to be done though for the bigger tires overall, it is really great product
DonGo
August 18, 2025
I watched a video on you tube on installation of my particular truck and installed in 30 minutes.Easy to program correction module from my lap top. Make sure you drive it to check corrected speed with a GPS. The tire sizes I input into the module over corrected speed, but it was easy to adjust.I'm very Happy with this HyperTech product. Now. my speedometer is within 1/2 mph of GPS speed
Zachary Chandler
June 12, 2025
Works perfect to correct my tire size in my Superduty
Customer
June 9, 2025
easy install and programing. no need for GPS anymore. I used this product because it was the only one that would go over 37" tires. That does not work very well for 44" tires.
Edward white
April 27, 2025
Called customer service the rep so short on the phone and unhelpful
Customer
April 4, 2025
Easy install and works great
MGPennington
February 25, 2025
Used to correct speedometer for 37†tires. Was a little hesitant to pull the cluster on my own but the video made it easy.
Shawn Atkinson
February 23, 2025
The product arrived quickly and was easy to use. Installation was simple and now my 2017 f250 is reading the correct speed with 37†tires
Button
January 4, 2025
Worked as expected, installation instructions were easy to follow.
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