A traditional, low-tech method involving a measured mile marker on a highway. Driving at a constant 60 mph should take exactly 60 seconds. A faster time indicates the speedometer is reading low, and vice-versa.

If a driver receives a speed-related ticket, a calibration report can prove the speedometer was inaccurate, often required to prove the exact speed in court.

Repairs to the gearbox, where most speed sensors are located, can cause calibration issues.

Test | Speedometer

A traditional, low-tech method involving a measured mile marker on a highway. Driving at a constant 60 mph should take exactly 60 seconds. A faster time indicates the speedometer is reading low, and vice-versa.

If a driver receives a speed-related ticket, a calibration report can prove the speedometer was inaccurate, often required to prove the exact speed in court. speedometer test

Repairs to the gearbox, where most speed sensors are located, can cause calibration issues. A traditional, low-tech method involving a measured mile