Virtually every vehicle manufactured since 1992 is equipped with an electronic speedometer that uses a sensor to read vehicle speed rather than a mechanical cable. The speed signal is also a big factor in the overall performance equation. When tire height and / or axle gearing is altered, the vehicle's Engine and Powertrain Control Modules receive an erroneous speed signal. This translates into subtle, yet real reductions in performance and fuel economy.

Our TruSpeed calibrator addresses all speed signal-related problems; it doesn't just correct the speedometer. How? The TruSpeed module installs in-line with the factory electronic speed sensor and converts the wrong speed signal into the correct one for your vehicle's new tire and / or axle gear ratio combination. Because the signal is altered at its source, all speed-sensitive vehicle systems will receive the correct speed data, which restores all proper functions. The TruSpeed is available for most domestic and import vehicles equipped with an electronic speedometer.