RacingDiffs

Calculate precise top speeds using your transmission and differential gear ratios.

This tool delivers accurate top speed calculations based on your transmission and final drive ratios, showing the maximum speed achievable in each gear.

You will need to provide the following variables:

Tire dimensions

Transmission gear ratios

Final drive ratio

RPM limit

You can also select your preferred unit of measurement, either kph or mph.

The insights from this app are essential for track and motorsport enthusiasts aiming to optimize their car's gearing for a specific circuit. It helps you find the ideal balance between top speed and acceleration, a critical factor for drag racers as well.

### What's New in Version 1.3

Last updated on Oct 12, 2024

Bug fixes