Do Bigger Tires Affect Gas Mileage?

Have you ever wondered if upgrading to bigger tires for your vehicle could impact its gas mileage? Many car enthusiasts and off-road enthusiasts contemplate this question when considering modifications that can enhance the aesthetics and performance of their vehicles.

In this article, we will explore the relationship between tire size and gas mileage to provide you with a comprehensive understanding of the subject.

Bigger Tires Affect Gas Mileage

Understanding Tire Size and Its Impact on Gas Mileage

Tire size refers to the measurements of a tire, usually indicated by a series of numbers and letters on its sidewall. The three primary dimensions are tire width, aspect ratio, and rim diameter.

While bigger tires can offer various advantages such as improved traction, ground clearance, and a more aggressive appearance, their impact on gas mileage is a topic of interest and concern for many drivers.

How Tire Diameter Affects Gas Mileage

The diameter of a tire has a direct impact on gas mileage. Lets check some factors:

The Relationship between Tire Diameter and Speedometer Accuracy

When you switch to bigger tires, the overall diameter of the tire increases. This alteration can affect the accuracy of your vehicle’s speedometer and odometer readings.

The larger circumference of the tire covers more ground with each revolution, resulting in a slower speedometer reading than the actual speed. Although this discrepancy doesn’t directly impact gas mileage, it’s important to consider it as it can affect your perception of fuel efficiency.

Rolling Resistance and Fuel Efficiency

One significant factor that influences gas mileage with bigger tires is rolling resistance. Rolling resistance refers to the force required to keep the tires rolling.

Larger tires typically have a larger contact patch with the road, resulting in increased rolling resistance. This increased resistance can lead to reduced fuel efficiency since more energy is required to maintain the same speed.

Factors That Influence Gas Mileage with Bigger Tires

While bigger tires may contribute to reduced gas mileage due to increased rolling resistance, other factors can influence the overall impact. Let’s explore some of these factors:

Weight and Load Capacity

Bigger tires are usually heavier than their smaller counterparts, primarily due to additional material and larger tread patterns. The increased weight can affect fuel economy since the engine needs to work harder to move the vehicle.

Additionally, if the vehicle is frequently loaded with heavy cargo or passengers, the extra weight combined with bigger tires can further decrease fuel efficiency. It’s important to consider the weight and load capacity of your vehicle when opting for larger tires to minimize the impact on gas mileage.


Aerodynamics play a crucial role in a vehicle’s fuel efficiency. Bigger tires can alter the aerodynamic profile of the vehicle, causing increased drag and wind resistance.

This can result in decreased gas mileage, especially at higher speeds. Vehicles with larger tires may experience more air turbulence, leading to a higher energy expenditure to overcome the resistance and maintain speed.

Engine Performance and Transmission

The performance capabilities of your vehicle’s engine and transmission also play a part in how bigger tires affect gas mileage. If your vehicle has a powerful engine and a well-matched transmission, the impact on gas mileage may be less significant.

However, vehicles with smaller engines or less efficient transmissions may experience a more noticeable decrease in fuel efficiency with bigger tires. The engine and transmission must work harder to compensate for the increased rolling resistance and weight.

Read: How to inflate a tire using a tire inflator

Real-world Effects of Bigger Tires on Gas Mileage

To better understand the real-world effects of bigger tires on gas mileage, it’s essential to consider fuel economy testing and vehicle-specific considerations.

Fuel Economy Testing and Ratings

Various organizations conduct fuel economy testing and provide ratings for vehicles equipped with different tire sizes. These ratings can give you a general idea of the impact on gas mileage when switching to bigger tires.

However, it’s crucial to note that these ratings may vary based on the specific vehicle model, engine type, and driving conditions.

Vehicle-Specific Considerations

Each vehicle model has unique characteristics that can affect how bigger tires impact gas mileage. Factors such as suspension design, gear ratios, and overall vehicle weight distribution can influence the specific fuel economy changes.

It’s advisable to consult your vehicle’s manufacturer or a professional mechanic who specializes in tire modifications to understand the potential impact on gas mileage for your specific make and model.

Tips for Maintaining Fuel Efficiency with Bigger Tires

While bigger tires may result in reduced gas mileage, there are steps you can take to mitigate the impact and maintain better fuel efficiency.

Regular Tire Maintenance and Inflation

Proper tire maintenance and inflation are crucial for optimal fuel efficiency, regardless of tire size. Ensure that your tires are inflated to the recommended pressure specified by the vehicle manufacturer.

Underinflated tires can increase rolling resistance and negatively affect gas mileage. Additionally, regular tire rotations, alignments, and inspections can help maintain balanced and efficient tire performance.

Choosing the Right Tire Type and Brand

When selecting bigger tires, consider the tire type and brand carefully. Some tire manufacturers offer models designed for improved fuel efficiency, featuring lower rolling resistance.

Research different options and read reviews to find tires that strike a balance between performance, aesthetics, and fuel economy. It’s essential to strike a balance between the desired performance enhancements and fuel economy when considering bigger tires.

While larger tires can enhance off-road capabilities, traction, and overall aesthetics, it’s crucial to evaluate the trade-off in gas mileage. Consider your driving habits, vehicle usage, and priorities to make an informed decision that aligns with your needs.

Read: How should be a tire in a sports car?


Do bigger tires always reduce gas mileage?

The installation of bigger tires generally increases rolling resistance and weight, which can lead to reduced gas mileage. However, the extent of the impact depends on various factors, such as tire type, vehicle-specific considerations, and driving conditions.

Are there any benefits to using bigger tires despite the impact on gas mileage?

Yes, there are benefits to using bigger tires. They can enhance off-road capabilities, improve traction, and give your vehicle a more aggressive appearance. However, it’s important to weigh these benefits against the potential decrease in gas mileage.

How much does tire pressure affect fuel efficiency?

Tire pressure plays a significant role in fuel efficiency. Underinflated tires increase rolling resistance and decrease gas mileage, while overinflated tires can negatively impact handling and tire wear. Maintaining the recommended tire pressure specified by the vehicle manufacturer is crucial for optimal fuel efficiency.

End Note

Switching to bigger tires can impact gas mileage due to factors such as increased rolling resistance, weight, aerodynamics, and engine performance. While the decrease in fuel efficiency may vary depending on various vehicle-specific considerations, it’s important to evaluate the trade-offs before making modifications.

By maintaining proper tire maintenance, inflation, and choosing the right tire type and brand, you can mitigate the impact on gas mileage while still enjoying the benefits of bigger tires. Ultimately, it’s a balancing act between performance enhancements and fuel efficiency.

Before making any modifications, it’s advisable to consult your vehicle’s manufacturer or a professional mechanic who specializes in tire upgrades. They can provide valuable insights and recommendations based on your specific vehicle model and driving needs.