Bald Tires: How Much Gas They Affect Your Fuel Economy And MPG [Update On 2024]

Bald tires hurt fuel economy and may cause odometer errors. They can overstate fuel efficiency by up to 1.5%, leading to inefficient driving. Bald tires also reduce safety and traction, raising accident risks. Regular tire maintenance is vital for safety and performance.

A study indicates that vehicles with bald tires could see a drop in fuel efficiency by approximately 10 to 15 percent. This reduction varies based on driving conditions, such as road type and terrain. Additionally, bald tires challenge vehicle control and safety, which can lead to more aggressive driving style. Aggressive driving further reduces fuel efficiency.

Regular tire maintenance and replacement can help avoid these issues. Ensuring your tires are properly inflated and have adequate tread can improve fuel economy.

Understanding how bald tires affect fuel economy is essential for maintaining vehicle performance. It emphasizes the importance of tire care for both safety and efficiency. In the next section, we will explore practical tips for maintaining your tires to maximize their lifespan and enhance your vehicle’s fuel economy.

Table of Contents

How Do Bald Tires Affect Fuel Efficiency?

Bald tires negatively affect fuel efficiency by increasing rolling resistance and reducing traction, leading to poorer mileage. This can result in higher fuel consumption.

Increased Rolling Resistance: Bald tires have a worn tread surface. This means they lack the grooves and patterns that help with traction. When the tread wears down, the tire makes more contact with the road surface. As a result, the car needs more energy to move, which worsens fuel economy. A study by the National Highway Traffic Safety Administration (NHTSA, 2015) indicated that rolling resistance can increase by up to 15% with improperly inflated or worn-out tires.
Reduced Traction: The tread on bald tires is essential for grip, especially in wet or slippery conditions. Without sufficient traction, the vehicle may slip or skid, and drivers may need to accelerate more to maintain control. This increased acceleration leads to greater fuel consumption. According to the Tire Industry Association (TIA), tires with worn tread can decrease fuel efficiency by about 10% due to the need for extra power.
Poor Performance in Adverse Conditions: Bald tires struggle to perform in adverse weather conditions such as rain or snow. When traction is compromised, vehicles may require more fuel to navigate these conditions safely. The AAA reports that tires with less than 2/32 inches of tread depth can significantly increase stopping distance, further contributing to higher fuel usage.
Increased Tire Wear: Bald tires can lead to uneven wear on the vehicle. When tires wear unevenly, they may drag or resist motion more than properly inflated and maintained tires. This drag can contribute to increased fuel consumption. According to a report by the U.S. Department of Energy (DOE, 2020), poorly maintained tires can reduce fuel economy by as much as 3-4%.

In summary, bald tires diminish fuel efficiency through increased rolling resistance, reduced traction, poor performance in adverse conditions, and uneven tire wear, ultimately leading to higher fuel consumption and costs.

What Are Bald Tires, and How Are They Defined?

Bald tires are tires that have worn down to the point where their tread depth is insufficient for safe grip and handling on the road. These tires typically lack adequate traction and are often considered unsafe for driving.

Definition of bald tires
Causes of tire baldness
Effects on vehicle performance
Legal implications
Preventative measures

Understanding bald tires involves recognizing their definition and the related aspects that impact driving safety and vehicle maintenance.

Definition of Bald Tires:
Bald tires are tires that have a tread depth of less than 1.6 millimeters, which is the minimum required for safe operation. The legal threshold in many regions mandates this depth to ensure proper traction on wet or slippery surfaces. According to the National Highway Traffic Safety Administration (NHTSA), tire tread helps disperse water and prevents hydroplaning. Tires with insufficient tread significantly increase the risk of accidents.
Causes of Tire Baldness:
Tire baldness can result from various factors. Improper inflation, aggressive driving habits, and misalignment of the vehicle can all contribute to uneven wear. For example, under-inflated tires wear more quickly on the outer edges, while over-inflated tires tend to wear through the center. Regular maintenance, including tire rotations and alignments, can prolong tire life.
Effects on Vehicle Performance:
Bald tires adversely affect a vehicle’s performance. They reduce grip, especially in wet conditions, leading to longer stopping distances and decreased control. The loss of traction can result in skidding or hydroplaning, especially during heavy rain. A study by the tire manufacturer Michelin found that vehicles equipped with bald tires faced a 50% higher risk of getting into accidents compared to those with adequate tread.
Legal Implications:
Driving on bald tires can have legal consequences. Many jurisdictions enforce laws that require tires to meet specific tread depth criteria. Motorists caught with bald tires may face fines and penalties. Additionally, insurance companies may deny claims for accidents involving bald tires, citing negligence in vehicle maintenance.
Preventative Measures:
To prevent tire baldness, regular maintenance is essential. Motorists should check tire pressure monthly and conduct visual inspections for signs of wear and tear. Rotating tires every 5,000 to 7,500 miles can promote even wear. Additionally, following the manufacturer’s recommendations for alignment and balancing can help extend tire lifespan.

By understanding the definitions and implications of bald tires, consumers can make more informed decisions about their vehicle maintenance and safety.

How Do Bald Tires Impact Fuel Consumption?

Bald tires negatively impact fuel consumption by increasing rolling resistance, leading to reduced fuel efficiency. This occurs due to several factors:

Increased Rolling Resistance: Bald tires have less tread depth compared to properly inflated and new tires. The reduction in tread depth leads to a larger contact area between the tire and the road. According to a study by the National Highway Traffic Safety Administration (NHTSA, 2017), a tire with less tread can increase rolling resistance by up to 15%. This means more energy is required for the vehicle to move, which ultimately enhances fuel consumption.
Reduced Traction: Bald tires provide less grip on the road surface. A study by the Rubber Manufacturers Association (RMA, 2018) indicates that tires with minimal tread can increase stopping distances and compromise vehicle handling. The driver may need to use the accelerator more aggressively to maintain speed, which translates into higher fuel usage.
Tire Pressure Loss: Worn-out tires can lead to air leakage. Tires that are not adequately inflated increase rolling resistance further. The U.S. Department of Energy states that under-inflated tires can decrease fuel economy by around 0.2% for every PSI (pound per square inch) drop in pressure. For an average passenger car, this can result in a significant decrease in overall fuel efficiency.
Increased Heat Generation: Bald tires may generate more heat due to increased friction with the road. Heat can affect tire performance and lead to additional energy loss. A study from the Tire Industry Association (TIA, 2019) found that tires working under higher operational temperatures can negatively affect fuel economy by 3% to 5% through increased rolling resistance and air resistance.

By reducing rolling resistance, maintaining tire pressure, and ensuring adequate tread depth, drivers can improve fuel consumption and overall vehicle performance.

What Specific Factors Contribute to Increased Fuel Usage with Bald Tires?

Bald tires can significantly increase fuel usage due to several specific factors.

Reduced traction
Increased rolling resistance
Poor tire alignment
Increased air resistance
Inadequate tire inflation

These factors contribute to reduced fuel efficiency. Understanding each of these can highlight the importance of maintaining tire quality.

Reduced Traction: Reduced traction occurs when tires are worn down. Bald tires have less grip on the road. This leads to slippage, which requires the engine to work harder to maintain speed. A study by the National Highway Traffic Safety Administration (NHTSA) in 2015 found that vehicles with bald tires can experience up to a 10% increase in fuel consumption under adverse conditions.
Increased Rolling Resistance: Increased rolling resistance happens because bald tires do not provide an optimal shape to minimize the friction against the road. As a result, the vehicle struggles to move forward, causing more fuel to be burned. According to the U.S. Department of Energy, rolling resistance can account for about 5% to 15% of fuel use in cars. Bald tires can exacerbate this issue further.
Poor Tire Alignment: Poor tire alignment can be a consequence of operating with bald tires. Misalignment causes uneven tire wear, leading to additional rolling resistance. When tires are out of alignment, they drag on the road rather than rolling smoothly, which can increase fuel consumption by 3% to 5%, according to the American Automobile Association (AAA).
Increased Air Resistance: Increased air resistance occurs as bald tires may alter the aerodynamics of a vehicle. A vehicle with uneven or worn-out tires can create more drag, as it does not slice through the air as efficiently. Research by the Automotive Research Association indicates that improper tire condition can lead to an additional 5% increase in fuel usage due to higher air resistance.
Inadequate Tire Inflation: Inadequate tire inflation is often experienced with bald tires. Worn tires can lose air pressure more rapidly. Under-inflated tires can lead to more fuel consumption, potentially increasing it by up to 6% to 8%, according to the Tire Industry Association. Proper inflation supports optimal tire performance and reduces unnecessary fuel wastage.

In summary, bald tires adversely affect various aspects of vehicle performance, leading to increased fuel usage. Regular tire maintenance is crucial for both safety and efficiency.

What Are the Consequences of Using Bald Tires on Gas Mileage?

Using bald tires can negatively impact gas mileage by increasing rolling resistance and decreasing traction. This leads to higher fuel consumption.

Increased Rolling Resistance
Reduced Traction and Handling
Safety Hazards
Higher Cost Over Time
Mixed Opinions on Impact

In examining these factors, we can better understand the full implications of using bald tires on gas mileage.

Increased Rolling Resistance:
Increased rolling resistance occurs when tires lose tread depth. Bald tires create more friction with the road surface. This friction forces the engine to work harder, thus consuming more fuel. According to a study by the U.S. Department of Energy, properly inflated and well-maintained tires can improve gas mileage by 3-4%. However, as tires become bald, this benefit sharply decreases.
Reduced Traction and Handling:
Reduced traction and handling arise from inadequate tire tread. Bald tires provide less grip on the road, especially in wet or slippery conditions. This can lead to less efficient acceleration and more slippage, further driving up fuel use. A study from the National Highway Traffic Safety Administration (NHTSA) indicated that tires lacking sufficient tread can lead to a loss of up to 30% in braking performance, which indirectly affects fuel efficiency due to stalled momentum.
Safety Hazards:
Safety hazards increase with bald tires. Poor tire performance raises the risk of accidents. The inability to stop or steer effectively can result in collisions, which may lead to increased expenses from repairs or insurance claims. According to a report by the NHTSA, tire-related crashes account for thousands of accidents annually.
Higher Cost Over Time:
Higher cost over time can be attributed to wasted fuel and frequent tire replacements. Drivers may find that the cost of extra fuel consumed by bald tires outweighs the initial savings from not replacing them promptly. The Energy Saving Trust estimates that poor tire maintenance can increase fuel costs by up to 10%.
Mixed Opinions on Impact:
Mixed opinions on the impact of bald tires exist among drivers. Some argue that the impact on fuel economy varies based on the type of driving and the vehicle’s weight. For instance, a light vehicle driven mostly on highways may experience less negative impact than a heavy city car. However, many agree that maintaining tire tread is crucial for overall fuel efficiency. A 2022 survey by AAA revealed that 78% of drivers believe that proper tire maintenance is essential for fuel efficiency.

Understanding these aspects highlights the importance of maintaining tire tread for optimal gas mileage and driving safety.

How Does Tire Grip and Traction Influence Your MPG?

Tire grip and traction significantly influence your miles per gallon (MPG). Better grip improves vehicle control, while adequate traction ensures efficient acceleration. Both factors affect how much fuel your engine consumes.

When tires have low tread depth, such as in bald tires, they lose grip. This loss makes the engine work harder. As a result, it consumes more fuel. Increased rolling resistance also occurs with worn tires. This means the engine exerts more effort to move the vehicle, which further decreases MPG.

Conversely, well-maintained tires provide optimal grip and traction. They reduce rolling resistance and ensure effective power transfer from the engine to the road. This efficiency leads to improved fuel economy.

In summary, maintaining proper tire conditions enhances grip and traction. This condition allows for better fuel efficiency and ultimately increases your MPG.

What Role Does Tire Wear Play in Fuel Economy?

Tire wear significantly affects fuel economy. Worn tires increase rolling resistance, requiring more energy to move the vehicle, which leads to decreased miles per gallon (MPG).

Increased rolling resistance
Effect on traction and stability
Impact of tire pressure
Cost-effectiveness of tire replacements

The relationship between tire wear and fuel economy is multi-faceted.

Increased Rolling Resistance:
Increased rolling resistance occurs when tires wear down. Worn tread results in a larger contact patch on the road. This means the engine must work harder to maintain speed, leading to higher fuel consumption. According to the U.S. Department of Energy, under-inflated tires can decrease fuel economy by up to 3%, while worn tires may further compound this effect.
Effect on Traction and Stability:
The effect on traction and stability comes from reduced tread depth on worn tires. Less tread reduces grip on wet or uneven surfaces. Poor traction can cause acceleration issues or require more throttle input, leading to increased fuel consumption. A study by the National Highway Traffic Safety Administration (NHTSA) found that vehicles with worn tires had delayed stopping distances and compromised handling.
Impact of Tire Pressure:
The impact of tire pressure is significant regarding fuel efficiency. Properly inflated tires enhance fuel economy by reducing rolling resistance. Worn tires often lead to incorrect inflation levels, further diminishing efficiency. The Rubber Manufacturers Association emphasizes that maintaining the optimal tire pressure can improve fuel economy by up to 3.3%.
Cost-effectiveness of Tire Replacements:
The cost-effectiveness of tire replacements offers another perspective. While replacing worn tires incurs an upfront cost, the long-term savings in fuel efficiency can be substantial. The U.S. Department of Transportation suggests that replacing worn tires can result in an average fuel savings of $50 annually. This highlights the financial benefits of proactive tire maintenance.

In summary, tire wear plays a critical role in fuel economy through increased rolling resistance, reduced traction, the importance of tire pressure, and the long-term cost-effectiveness of timely replacements.

How Can You Monitor Tire Conditions to Optimize Fuel Economy?

You can monitor tire conditions to optimize fuel economy by regularly checking tire pressure, inspecting tread depth, and ensuring proper alignment. These practices help reduce rolling resistance, which influences fuel consumption.

Tire Pressure: Maintaining the correct tire pressure is crucial for fuel efficiency. Under-inflated tires create more rolling resistance. According to the U.S. Department of Energy, reducing tire pressure by just 1 psi can decrease fuel economy by 0.2% to 0.4%. Regularly check your tire pressure at least once a month and before long trips.

Tread Depth: The tread depth of a tire affects its grip and rolling resistance. A depth of at least 2/32 of an inch is recommended for safe driving. Tires with worn tread can lead to decreased fuel efficiency. A study from the National Highway Traffic Safety Administration (NHTSA) in 2021 found that new tires with proper tread can increase fuel efficiency by about 3% compared to worn ones.

Alignment: Proper wheel alignment reduces uneven tire wear and ensures that tires roll straight. Misalignment increases drag and can decrease fuel economy. The American Automobile Association (AAA) states that proper alignment can improve fuel efficiency by up to 10%.

Regular Inspections: Conducting regular visual inspections can help identify issues early. Look for visible wear, bulges, or foreign objects embedded in the tires. A study from Tire Rack in 2022 reported that early detection of tire problems can save up to 4% on fuel costs.

By focusing on these key tire maintenance practices, you can enhance your vehicle’s overall efficiency and achieve better fuel economy.

What Maintenance Steps Can You Take to Prevent Balding?

To prevent balding, individuals can follow specific maintenance steps that promote healthy hair growth and minimize hair loss.

Maintain a balanced diet rich in vitamins.
Avoid excessive heat and chemical treatments.
Practice gentle hair care techniques.
Manage stress effectively.
Regularly exercise for better circulation.
Consult with a healthcare professional for underlying conditions.
Use suitable hair products.
Avoid tight hairstyles that pull on hair.
Consider supplements for hair health.
Stay hydrated.

These maintenance steps offer diverse strategies for individuals concerned about hair thinning and loss. The effectiveness of each step may vary based on personal circumstances, including genetics, health condition, and lifestyle factors.

Maintain a balanced diet rich in vitamins: Maintaining a balanced diet rich in vitamins helps nourish hair follicles. Key nutrients include vitamins A, C, D, E, and B-complex, particularly biotin. According to a study by the American Academy of Dermatology in 2020, deficiencies in these vitamins can lead to hair loss. Including foods such as leafy greens, fish, eggs, and nuts promotes optimal hair health.
Avoid excessive heat and chemical treatments: Avoiding excessive heat and chemical treatments protects hair from damage. High heat from styling tools can weaken hair and lead to breakage. A 2019 study published in the Journal of Cosmetic Dermatology found that regular heat styling increased the risk of hair damage and thinning, suggesting the need for lower heat settings or heat protection products.
Practice gentle hair care techniques: Practicing gentle hair care techniques minimizes hair breakage. This includes using a wide-toothed comb, avoiding vigorous towel-drying, and limiting shampooing frequency. Research published in the International Journal of Trichology in 2021 indicates that harsh treatments and aggressive brushing can lead to a higher incidence of hair loss.
Manage stress effectively: Managing stress effectively can prevent hair loss linked to stress-induced conditions. Chronic stress can trigger telogen effluvium, where hair prematurely enters the shedding phase. A study from Harvard University in 2018 highlighted that stress management practices, such as meditation and mindfulness, positively impact hair health.
Regularly exercise for better circulation: Regular exercise for better circulation supports hair growth by improving blood flow to the scalp. Increased circulation allows more nutrients to reach hair follicles. The Mayo Clinic recommends at least 150 minutes of moderate aerobic activity weekly to enhance overall health, including hair condition.
Consult with a healthcare professional for underlying conditions: Consulting with a healthcare professional for underlying conditions is crucial for addressing hair loss. Conditions such as thyroid disorders and anemia can contribute to hair thinning. A 2020 review in the journal Hair Therapy & Transplantation emphasized the importance of diagnosing and treating medical conditions affecting hair health.
Use suitable hair products: Using suitable hair products tailored to individual hair types can prevent damage. Using sulfate-free shampoos and conditioners promotes moisture retention. Research from the Journal of Dermatological Treatment in 2020 found that choosing appropriate hair care products can significantly reduce hair breakage.
Avoid tight hairstyles that pull on hair: Avoiding tight hairstyles that pull on hair prevents traction alopecia, a form of hair loss caused by excessive tension on hair roots. The American Academy of Dermatology advises limiting styles such as tight ponytails or braids that can damage hair follicles over time.
Consider supplements for hair health: Considering supplements for hair health can benefit individuals lacking essential nutrients. Popular supplements for hair growth include biotin, vitamins D and E, and omega-3 fatty acids. A 2021 study in the Journal of Cosmetic Dermatology found a positive correlation between biotin supplementation and hair growth in participants with thinning hair.
Stay hydrated: Staying hydrated is vital for maintaining overall health, including hair health. Dehydration can lead to dry, brittle hair, increasing the likelihood of breakage. The Institute of Medicine recommends about 3.7 liters (or about 13 cups) of total water for men and 2.7 liters (or about 9 cups) for women per day for optimal hydration.

By implementing these maintenance steps, individuals can support their hair health and potentially prevent balding.

How Do Proper Inflation Levels Affect Fuel Efficiency with Bald Tires?

Proper inflation levels positively affect fuel efficiency, even with bald tires, by improving contact with the road and reducing rolling resistance. However, it’s important to note that bald tires inherently decrease fuel efficiency due to increased friction and impaired traction.

When tires are not properly inflated, fuel efficiency is compromised. Detailed points are as follows:

Contact with the road: Properly inflated tires maintain optimal surface contact. This allows the vehicle to have better traction and stability. In contrast, bald tires provide less grip, leading to potential skidding and greater energy expenditure during acceleration.
Rolling resistance: Proper tire inflation reduces rolling resistance, which is the energy lost when tires roll on surfaces. A study by the National Highway Traffic Safety Administration (NHTSA) in 2009 found that properly inflated tires can improve fuel economy by up to 3.3%. On bald tires, rolling resistance increases due to worn tread design. This means more engine effort is needed, leading to decreased fuel efficiency.
Tire temperature: Proper inflation helps maintain an appropriate tire temperature during driving. An under-inflated tire may overheat due to excessive flexing, which can cause additional energy loss. According to a report from the American Automobile Association (AAA) in 2016, nearly 1 in 4 drivers has at least one under-inflated tire, leading to lower fuel efficiency and increased tire wear.
Safety concerns: Under-inflated or bald tires can lead to increased braking distance and a higher likelihood of tire blowouts, impacting overall safety and fuel efficiency. The National Safety Council (NSC) indicates that proper tire maintenance, including inflation, can reduce the risk of accidents.

In conclusion, while proper inflation can enhance fuel efficiency, bald tires are inherently less efficient and more hazardous. Maintaining tire health is crucial for maximizing fuel efficiency and ensuring safe driving conditions.

What Expert Insights Are Available on Bald Tires and Fuel Economy?

Bald tires can significantly affect fuel economy and increase gas consumption. Drivers should ensure proper tire maintenance for optimal vehicle performance.

Increased Rolling Resistance
Reduced Traction
Tire Pressure and Wear
Safety Implications
Environmental Impact

The points above provide a foundation for understanding the relationship between bald tires and fuel economy. Each point highlights how tire conditions can influence overall vehicle performance and efficiency.

Increased Rolling Resistance:
Increased rolling resistance occurs when tires are bald, leading to a decrease in fuel efficiency. Rolling resistance is the energy required to keep a vehicle moving. A study by the National Highway Traffic Safety Administration found that worn tires can reduce fuel economy by up to 10%. This reduction arises because bald tires create a larger contact patch with the road, causing the engine to work harder.
Reduced Traction:
Reduced traction is a significant concern with bald tires. Worn tires lose their tread depth, which affects grip on various surfaces, especially in wet conditions. According to Consumer Reports, tires with less than 2/32 of an inch of tread can double stopping distances in wet weather. Reduced traction can lead to skidding, which not only affects safety but also fuel economy as drivers may need to accelerate and brake more frequently.
Tire Pressure and Wear:
Tire pressure and wear are closely related to fuel economy. Under-inflated bald tires lead to increased friction and rolling resistance. The Department of Energy states that properly inflated tires can improve gas mileage by 0.4% for every 1 psi drop in the average pressure of all tires. Regular checks and maintenance of tire pressure can optimize fuel efficiency and prolong tire life.
Safety Implications:
Safety implications are critical when considering bald tires. Worn tires can increase the risk of blowouts and loss of control on the road. The Rubber Manufacturers Association emphasizes that proper tire maintenance can prevent accidents and improve safety. Furthermore, accidents can lead to higher fuel consumption due to the implications of emergency braking and heavy acceleration following a dangerous situation.
Environmental Impact:
Environmental impact arises from the increased fuel consumption associated with bald tires. Higher fuel usage contributes to greater greenhouse gas emissions. The Environmental Protection Agency estimates that for every gallon of gasoline consumed, approximately 19.6 pounds of carbon dioxide are emitted. Thus, maintaining tire health is not only crucial for personal safety and economics but also for environmental stewardship.

In summary, maintaining good tire conditions is essential for optimizing fuel economy, ensuring safety, and minimizing environmental impacts.

What Do Studies Say About the Effects of Bald Tires on Gas Mileage?

Bald tires negatively impact gas mileage due to decreased traction and increased rolling resistance. This can lead to reduced fuel efficiency and higher fuel costs over time.

Key points regarding the effects of bald tires on gas mileage include:
1. Increased rolling resistance
2. Decreased traction
3. Reduced fuel efficiency
4. Safety hazards
5. Cost implications

Understanding the relationship between bald tires and gas mileage is crucial for vehicle maintenance and safety considerations.

Increased Rolling Resistance:
Increased rolling resistance occurs when a tire wears down to the point where its surface becomes smooth. This smooth surface requires more energy to move the vehicle, which can lead to decreased fuel efficiency. According to a study by the National Highway Traffic Safety Administration (NHTSA) in 2013, tires in poor condition could increase fuel consumption by as much as 10%.
Decreased Traction:
Decreased traction is another consequence of bald tires. Worn tires lack the grooves needed to grip the road, especially in wet or slippery conditions. This can result in longer stopping distances and reduced handling, leading to a less efficient drive. The AAA reports that tire tread depth under 2/32 inches significantly compromises traction.
Reduced Fuel Efficiency:
Reduced fuel efficiency is a direct result of both increased rolling resistance and decreased traction. Various studies, like one conducted by the American Automobile Association, suggest that maintaining proper tire pressure and tread depth can improve fuel economy by 3% to 4%. Hence, bald tires can negate these benefits.
Safety Hazards:
Safety hazards stem from the performance decrease associated with bald tires. Poorly performing tires increase the risk of accidents, which may lead to additional costs for repairs or medical bills. The NHTSA emphasizes that tires are a critical part of vehicle safety.
Cost Implications:
Cost implications arise when considering the increased fuel expenses and potential repair costs due to accidents. Over time, drivers may spend significantly more on gas and repairs due to the inefficiency caused by bald tires. Multiple studies, including one by the Tire Industry Association, indicate that maintaining tires in good condition could save drivers up to $500 annually in fuel costs.

Neglecting tire maintenance can lead to a host of problems beyond just fuel inefficiency. Drivers should regularly inspect tire conditions for safety and economic benefits.

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Bald Tires: How Much Gas They Affect Your Fuel Economy and MPG