Unlock Optimal Performance with Our Gear Ratio Calculator and Tire Size Chart Credit: g2axle

Are you struggling to find the perfect balance between your vehicle’s gear ratio and tire size? Whether you’re an off-road enthusiast or simply looking to enhance your daily driving experience, understanding this relationship is key to achieving optimal performance. Our gear ratio calculator and tire size chart provide a seamless way to make informed decisions and get the best out of your vehicle.

Why Gear Ratio and Tire Size Matter
The Basics of Gear Ratio

Gear ratio is the ratio between the input shaft and the output shaft in your vehicle’s transmission. It determines how many times the drive shaft turns to make the wheels turn once. A higher gear ratio means more power but less speed, whereas a lower gear ratio offers more speed but less power.

The Impact of Tire Size

Tire size affects your vehicle’s overall gearing. Larger tires cover more ground per revolution, effectively lowering your gear ratio. Conversely, smaller tires raise your gear ratio. This change can significantly impact your vehicle’s acceleration, top speed, and fuel efficiency.

Using a Gear Ratio Calculator for Tire Size Adjustments

Our gear ratio calculator helps you find the ideal gear ratio for your specific tire size, ensuring your vehicle performs at its best. Here’s how to use it:

  1. Enter Tire Size: Input your tire dimensions (e.g., 35x12.50R15).

  2. Current Gear Ratio: Enter your current gear ratio.

  3. Desired Performance: Specify whether you’re looking for better acceleration, fuel economy, or a balance of both.

  4. Calculate: The calculator provides the recommended gear ratio for optimal performance.

Example Calculation
  • Tire Size: 35x12.50R15

  • Current Gear Ratio: 4.10

  • Desired Performance: Better acceleration

The calculator recommends a gear ratio of 4.56 to maintain optimal performance with the larger tire size.

Comprehensive Gear Ratio and Tire Size Chart

For a quick reference, our gear ratio and tire size chart helps you understand the impact of different tire sizes on your gear ratio. This chart is a valuable tool for anyone making modifications to their vehicle.

Tire Size

3.73 Gear Ratio

4.10 Gear Ratio

4.56 Gear Ratio


2800 RPM

3000 RPM

3300 RPM


2600 RPM

2800 RPM

3100 RPM


2400 RPM

2600 RPM

2900 RPM


2200 RPM

2400 RPM

2700 RPM

How to Read the Chart
  • RPM: Revolutions per minute at a given speed (typically 60 mph).

  • Gear Ratio: The gear ratio you currently have or are considering.

This chart helps you visualize how changing your tire size affects engine RPM and overall performance.

Recommended Tire Matches for Optimal Performance
Toyo Open Country A/T III

For a versatile tire that performs well both on and off the road, the Toyo Open Country A/T III is a top choice. It offers excellent traction, durability, and comfort, making it ideal for various driving conditions.

  • Recommended Size: 35x12.50R17

Nitto Ridge Grappler

The Nitto Ridge Grappler is perfect for those who demand high performance in off-road conditions while maintaining smooth on-road handling. Its hybrid design provides excellent traction and durability.

  • Recommended Size: 37x12.50R18

BFGoodrich All-Terrain T/A KO2

BFGoodrich’s All-Terrain T/A KO2 tires are known for their rugged durability and exceptional off-road performance. They’re a great match for anyone looking to enhance their vehicle’s capability in challenging terrains.

  • Recommended Size: 33x12.50R15

Installation Tips for Adjusting Gear Ratio and Tire Size
Step-by-Step Installation Guide
  1. Preparation: Ensure you have the correct tire size and gear ratio components.

  2. Remove Old Components: Lift your vehicle and safely remove the old tires and gears.

  3. Install New Tires: Fit the new tires onto your vehicle, ensuring they are properly aligned.

  4. Adjust Gear Ratio: Replace the old gear set with the new one as per the manufacturer’s instructions.

  5. Test Drive: Take your vehicle for a test drive to ensure everything is functioning correctly.

Tools Needed
  • Jack and jack stands

  • Lug wrench

  • Torque wrench

  • Gear puller

  • Alignment tools

Conclusion: Master Your Vehicle's Performance with the Right Gear Ratio and Tire Size

Optimizing your vehicle’s performance is all about finding the perfect balance between gear ratio and tire size. Using our gear ratio calculator and tire size chart, you can make informed decisions to enhance your driving experience, whether on the highway or rugged off-road trails. Pair your adjustments with top-tier tires from Toyo, Nitto, and BFGoodrich for the best results.