1. What is Gear Ratio?

The gear ratio is the ratio of engine RPM to wheel RPM, representing how many times the engine turns for each revolution of the wheels. It's a crucial factor in vehicle performance and efficiency.

2. How Does the Calculator Work?

The calculator uses the simple gear ratio formula:

Where:

• Engine RPM — Revolutions per minute of the engine
• Wheel RPM — Revolutions per minute of the wheels

Explanation: The ratio shows how much the engine's rotation is reduced or increased to turn the wheels.

3. Importance of Gear Ratio Calculation

Details: Proper gear ratio affects acceleration, top speed, fuel efficiency, and engine longevity. It's essential for vehicle tuning and performance optimization.

4. Using the Calculator

Tips: Measure engine RPM with a tachometer and wheel RPM with a rotation counter. Enter both values in RPM (revolutions per minute).

5. Frequently Asked Questions (FAQ)

Q1: What's a typical gear ratio for passenger cars?
A: Most passenger cars have final drive ratios between 2.5:1 and 4.5:1, depending on the vehicle's purpose.

Q2: How does gear ratio affect performance?
A: Lower ratios (numerically higher) improve acceleration but reduce top speed, while higher ratios improve fuel economy at highway speeds.

Q3: Should I measure wheel RPM with or without load?
A: For accurate gear ratio calculation, measure under normal driving conditions with typical load.

Q4: Does tire size affect gear ratio?
A: Yes, larger tires effectively create a higher gear ratio, while smaller tires create a lower ratio.

Q5: How can I use this for transmission gear ratios?
A: Multiply the transmission gear ratio by the final drive ratio to get the overall ratio in each gear.