Speedometer Calibrator | Inline | Toyota Tundra 4WD (2014-2021)

Rough Country’s Inline Speedometer Calibrator is the precise, plug‑and‑play solution for Toyota Tundra 4WD owners upgrading to larger tires. If you’ve lifted your truck, this device reprograms the speedometer and updates the ECM to keep readings and performance accurate.

• Compatibility: Designed for Toyota Tundra 4WD (2014–2021) with lifted setups to compensate for larger tires.
• Inline, Plug‑and‑Play Installation: Connects directly to the Diagnostic Link Connector Port with an easy, tool-free setup.
• ECM Calibration: Reprograms the speedometer and updates the vehicle’s ECM to preserve accurate shift points and Electronic Stability Control.
• Tire-Size Compensation: Corrects speed readings after upgrading to larger tires so your odometer and readouts reflect true speed.
• Stock Reset Function: Quick option to revert the speedometer back to factory settings before servicing.
• Warranty: Includes a 1‑Year Warranty for peace of mind.

With the speedometer calibrated to match your upgraded tires, you’ll experience accurate speed readings, reliable shift points, and consistent stability control. The plug‑in design makes installation straightforward and reversible, so you can calibrate for trips or switch back for service without guesswork. This device helps protect your daily driving experience, ensures safer highway and off‑road performance, and preserves the value of your investment by maintaining correct vehicle dynamics after tire upgrades.