Gear Ratio Calculator
Calculate gear ratios, transmission ratios, and final drive ratios. Understand how gear selection affects acceleration and top speed.
Step 1: Gear Details
Understanding Gear Ratios
Gear ratios determine how many times the engine rotates for each wheel rotation. Higher ratios provide more torque and acceleration, while lower ratios allow for higher top speeds. The overall gear ratio is calculated by multiplying the transmission ratio by the final drive ratio.
Step 2: Additional Options
About Gear Ratios
The overall gear ratio affects your vehicle’s performance characteristics. Lower gear ratios provide better acceleration but limit top speed. Higher gear ratios allow for higher top speeds but reduce acceleration. The ideal ratio depends on your vehicle’s purpose and engine characteristics.
Gear Ratio Results
Overall Gear Ratio
Gear Ratio Comparison
| Gear Setup | Transmission Ratio | Final Drive | Overall Ratio | Speed at 6000 RPM |
|---|
Gear Ratio Breakdown
Gear Ratio Formula
Overall Ratio = Transmission Ratio × Final Drive Ratio
To calculate the overall gear ratio, multiply the transmission gear ratio by the final drive ratio. For example: 3.5 transmission ratio with 4.1 final drive = 3.5 × 4.1 = 14.35 overall ratio.
Speed (MPH) = (RPM × Tire Diameter) / (Overall Ratio × 336)
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