Gear Ratio Calculator
Calculate a top speed at a given engine speed at different transmission gearing. You may find it useful for calculating theoretical top speeds in mile and half mile racing such as the Texas Mile.
- Engine RPM - engine RPM that you will be shifting at or your cruising engine speed
- Rear Diff Ratio - gearing ratio of your rear differential
- Tire Height (in.) - tire height in inches
|Engine RPM||Rear Diff Ratio||Tire Height (in.)|