Gear Ratio Calculator
This calculator is for finding your maximum speed for each gear. You can either enter the values manually or use the presets on the right. The presets on the right only change the Transmission Ratios, Final Drive Ratio and Engine Redline for the specific models. You you need to enter in your tire size, the E46 Profiles do not change it. These are specifications for US cars only. Other countries have different ratios for the same car. This will also calculate your highway cruising engine RPMs for a given speed.
* These results are based on mathematical formulas. Your actual speed may vary. Top speeds are theoretical. I am not responsible for any inaccuracies provided in these calculations. They are only provided for entertainment / informational purposes.
E-mail me questions / comments / or corrections to my info.