Teeth count.
Ready to Calculate
Enter values on the left to see results here.
Found this tool helpful? Share it with your friends!
The Speedometer Gear Calculator is an essential tool for automotive professionals and enthusiasts alike. It precisely determines the correct speedometer driven gear required to ensure your vehicle's speed display is accurate. By inputting your specific tire size and axle ratio, this calculator applies a sophisticated formula to account for changes in driveline geometry. This ensures that modifications such as larger tires or differential upgrades do not result in erroneous speed readings, preventing potential legal issues and maintaining correct mileage tracking. It provides a reliable solution for recalibrating your speedometer with precision and confidence.