285/70R17 Height Tire: Dimensions, Size & Conversion Guide

When upgrading tires for your truck or SUV, the 285/70R17 size is a popular choice due to its excellent balance of off-road capability and on-road performance. One of the most common questions drivers have is about the 285/70R17 height, as tire dimensions play a crucial role in vehicle handling and clearance. 

The 285/70R17 tire has an approximate diameter of 32.8 inches (832 mm), providing better ground clearance for off-roading. To convert 285/70R17 to inches, simply divide the width (285 mm) by 25.4, which gives you 11.2 inches. The 285/70R17 to inches diameter is a critical factor to consider when upgrading, as it directly impacts vehicle performance and tire compatibility. 

Understanding these tire measurements ensures that you select the right size for your vehicle’s needs, whether you’re looking for improved traction, comfort, or load-bearing capacity.

What Does 285/70R17 Mean?

The 285/70R17 tire size is a common designation used to describe a specific tire’s dimensions and construction. The 285 refers to the tire’s width, which is 285 millimeters across, or about 11.2 inches. The 70 represents the aspect ratio, meaning the height of the tire’s sidewall is 70% of the tire’s width, which translates to roughly 200 millimeters or 7.9 inches. 

The R indicates that the tire is of radial construction, which is the most common type of tire structure today, where the tire’s internal layers are arranged radially. Lastly, the 17 signifies that the tire is designed to fit a 17-inch diameter wheel. 

This combination of numbers and letters helps determine the tire’s overall size, performance characteristics, and compatibility with different vehicles, especially trucks and SUVs that require a more rugged, durable tire for off-road and heavy-duty use.

Decoding the Tire Numbers: Understanding 285/70R17

The 285/70R17 tire size consists of three key components, each offering crucial details about the tire’s design. Let’s break down the tire numerology:

• 285: This number represents the tire width in millimeters. A 285 mm width translates to 11.2 inches. The wider the tire, the better the grip and stability, especially on trucks and SUVs.
• 70: This is the aspect ratio, which shows the sidewall height as a percentage of the tire’s width. For a 70 aspect ratio, the sidewall height is 70% of 285 mm, or 200 mm. A higher aspect ratio provides more cushion and a smoother ride, but it can affect handling.
• R: The letter R stands for radial construction, which means the tire’s internal layers are arranged radially. Radial tires are the most common type today, offering good durability and performance.
• 17: This number indicates the wheel diameter in inches. The 17-inch diameter means the tire is designed to fit a 17-inch wheel. Larger wheels typically offer better responsiveness and cornering but may compromise comfort.

In short, the 285/70R17 tire is 285 mm wide, with a 200 mm sidewall height, fits a 17-inch wheel, and is made with radial construction. These factors determine how the tire performs in various conditions and on different vehicles.

285/70R17 Tire Dimensions in Inches and Millimeters

The 285/70R17 tire size is commonly used in trucks, SUVs, and off-road vehicles. It offers a balance of height, width, and durability, making it suitable for various driving conditions. Here’s a quick overview of the tire’s key dimensions:

This table highlights the essential measurements, providing a clear view of the 285/70R17 tire’s overall size and performance features.

Detailed Analysis of 285/70R17 Height and Specifications

The 285/70R17 tire size is often chosen for larger vehicles like trucks and SUVs due to its impressive combination of height and width. Here’s a deeper dive into its dimensions and how they affect performance:

Tire Height

• The 285/70R17 tire has an approximate overall height of 32.8 inches (832 mm).
• This height is achieved by combining the sidewall height and wheel diameter.
  • The sidewall height is 7.9 inches (200 mm), which makes up the vertical distance from the edge of the tire to the wheel rim.
  • The wheel diameter is 17 inches (431.8 mm).
  • When you add the sidewall height on both sides of the wheel diameter, the result is the overall tire height: 32.8 inches (832 mm).

Tire Width

• The 285/70R17 tire has a width of 11.2 inches (285 mm).
• A wider tire provides better traction, especially in off-road conditions, making it more suitable for trucks and SUVs that need a solid grip on uneven surfaces.

Circumference and Revolutions

• The circumference of the tire is approximately 103 inches (2612.5 mm).
• This larger circumference results in 615 revolutions per mile (383 per kilometer), meaning the tire covers more ground with each rotation, which influences fuel efficiency and vehicle dynamics.

Sidewall Height

• The sidewall height of 7.9 inches (200 mm) plays a crucial role in ride comfort.
  • Taller sidewalls allow for better shock absorption, providing a smoother ride, especially on uneven or rough roads.
  • A higher sidewall also improves the tire’s ability to clear obstacles, which is ideal for off-road driving.

Wheel Compatibility

• The 17-inch wheel diameter makes this tire compatible with a wide range of trucks, SUVs, and off-road vehicles.
• Larger wheels, like the 17-inch diameter in the 285/70R17, contribute to better responsiveness and cornering abilities, but they may reduce ride comfort slightly.

How To Convert 285/70R17 to Inches?

To convert the 285/70R17 tire size into inches, follow these simple steps:

1. Convert the width (285 mm) to inches:
   • 285 mm ÷ 25.4 = 11.2 inches
   • So, the tire width is approximately 11.2 inches.
2. Calculate the sidewall height:
   • The sidewall height is 70% of the tire width. So, multiply 11.2 inches by 0.70:
   • 11.2 inches × 0.70 = 7.9 inches
   • The sidewall height is approximately 7.9 inches.
3. Add the wheel diameter:
   • The wheel diameter is already in inches: 17 inches.
   • The total tire height is calculated by adding the sidewall height (above and below the wheel) to the wheel diameter.
   • 7.9 inches × 2 (for both sides) + 17 inches = 32.8 inches

So, the 285/70R17 tire translates to:

• Width: 11.2 inches
• Sidewall height: 7.9 inches
• Total height: 32.8 inches

This means a 285/70R17 tire is approximately 32.8 inches tall, with a width of 11.2 inches.

How Tire Size Affects Vehicle Performance?

The size of your tire, like 285/70R17, plays a significant role in how your vehicle performs. Here’s how the dimensions of a tire impact various aspects of driving:

• Traction and Grip: Larger tires, such as the 285/70R17, generally provide better traction due to their wider surface. This makes them ideal for off-road vehicles and trucks that need more grip on uneven or rough terrain, like mud or gravel.
• Ground Clearance: With a larger tire height (in this case, 32.8 inches), you get more ground clearance, which helps avoid obstacles like rocks or bumps while driving off-road. It also improves the vehicle’s ability to handle rough roads.
• Handling and Stability: The wider tire gives you better stability, especially when carrying heavy loads. However, the increased size and height can also make the vehicle feel less nimble or responsive, especially in sharp turns, as it raises the vehicle’s center of gravity.
• Fuel Efficiency: Larger tires require more energy to rotate, which can reduce fuel efficiency. As a result, you might experience a slight decrease in mileage when using tires like 285/70R17 compared to smaller tires.
• Comfort: Taller tires, like the 285/70R17 (with a 7.9-inch sidewall), can offer a smoother ride, especially on uneven surfaces, by absorbing more bumps. However, they can make the ride stiffer on highways, as the sidewall height influences how the tire handles road vibrations.
• Speedometer Accuracy: Since a larger tire has a greater circumference (about 103 inches), it can affect the accuracy of your speedometer and odometer, which may need recalibration to ensure correct readings.

In summary, while larger tires like the 285/70R17 improve traction and ground clearance, they may impact fuel efficiency and handling. Always choose a tire size that matches your vehicle’s needs and driving conditions.

265/70R17 vs 285/70R17: A Comparative Analysis

Here’s a detailed comparison of the 265/70R17 and 285/70R17 tire sizes, showing how their dimensions affect vehicle performance:

Key Observations:

• Diameter: The 285/70R17 tire is 1.1 inches taller than the 265/70R17 tire, offering better ground clearance.
• Width: The 285/70R17 tire is 0.79 inches wider, which provides increased traction and stability.
• Circumference: With a larger circumference, the 285/70R17 tire covers more ground per revolution, impacting speed and fuel efficiency.
• Sidewall Height: The 285/70R17 has a taller sidewall, improving ride comfort and off-road ability.
• Revolutions per Mile: The 285/70R17 tire has fewer revolutions per mile, which can affect the vehicle’s speedometer readings and fuel consumption.

Speedometer Difference:

Larger tires like 285/70R17 can cause the speedometer to under-report the vehicle’s actual speed. For example, at 60 mph, the actual speed is approximately 62.09 mph.

This comparison helps you understand the key differences in performance between the 265/70R17 and 285/70R17 tires, assisting in making an informed decision based on your driving needs.

Popular Vehicles That Use 285/70R17 Tires

The 285/70R17 tire size is a popular choice for many trucks, SUVs, and off-road vehicles because it offers better traction, ground clearance, and load-bearing capacity. Here are some vehicles that typically use these tires:

• Jeep Wrangler (JK & JL): This off-road SUV is known for its ability to handle rough terrains, and the 285/70R17 tires provide excellent traction and ground clearance for off-road adventures.
• Toyota Tacoma: A pickup truck that benefits from the 285/70R17 tire’s improved stability, off-road performance, and higher load capacity, making it great for both daily driving and rugged terrain.
• Chevrolet Silverado 1500: This full-size pickup truck uses the 285/70R17 tires for better handling, off-road performance, and strength, perfect for heavy-duty tasks and off-road excursions.
• Ford F-150: A top-selling pickup truck in the U.S., the 285/70R17 tire size is a great fit for the F-150, as it improves off-road traction, handling, and overall performance.
• Dodge Ram 1500: Known for its ruggedness, the 285/70R17 tire enhances off-road ability and stability, making the Ram 1500 well-suited for both work and adventure.
• Nissan Frontier: A smaller pickup truck that benefits from the tire’s larger size, improving its off-road capabilities and towing performance.
• GMC Sierra 1500: Another full-size pickup truck, the 285/70R17 tire size is ideal for the Sierra, providing better traction for both on-road and off-road use.
• Toyota 4Runner: A rugged SUV that uses the 285/70R17 tire for better off-road performance, making it perfect for outdoor adventures and uneven terrain.

These vehicles are often used for off-roading, heavy-duty tasks, or outdoor activities, and the 285/70R17 tire helps improve their overall performance in those conditions.

Pros and Cons of Using 285/70R17 Tires

Here’s a breakdown of the pros and cons of using 285/70R17 tires in a table format:

Alternate 285/70R17 Replacement Tire Sizes

If you’re looking to replace your 285/70R17 tires, there are a few alternate sizes that are compatible, ensuring similar performance and dimensions. It’s important to note that when replacing tires, the new size should be within 3% of the original tire’s diameter for safety and optimal performance. Here are some common alternatives:

• 275/70R17: This tire size is slightly narrower than the 285/70R17 but still provides similar overall height and performance. It’s a common replacement size that can offer a good balance of traction and comfort.
• 265/70R17: This size is a bit narrower than the 285/70R17 and has a slightly lower sidewall height. It provides a similar overall diameter and can be a good option for those looking for slightly improved fuel efficiency and handling.
• 305/70R17: This is a wider tire that offers a larger footprint for improved traction and stability. The overall height might be slightly higher than the 285/70R17, making it a suitable option for those seeking more ground clearance.
• 275/65R17: A smaller alternative that is narrower and has a lower sidewall height, which may slightly reduce the overall diameter. This option could be suitable for vehicles that don’t require as much ground clearance but still want to maintain good handling and traction.

When selecting an alternate tire size, it’s essential to consult your vehicle’s manual or a tire expert to ensure that the new tire size is compatible with your vehicle’s specifications and performance requirements.

How to Choose the Right 285/70R17 Tires?

When buying 285/70R17 tires, it’s important to consider several factors to ensure you pick the best option for your vehicle and driving needs. Here’s a simple guide to help you make the right choice:

1. Know Your Vehicle’s Needs

• Vehicle Type: These tires are great for trucks, SUVs, and off-road vehicles. Make sure your vehicle is suitable for this tire size.
• Driving Conditions: Think about where you drive most often. If you mostly drive on highways, you might want tires designed for road performance. For off-road use, choose tires that provide good traction in mud, snow, and gravel.

2. Choose the Right Tire Type

• All-Terrain Tires: These are good for both on and off-road driving. They offer a mix of comfort, durability, and traction.
• Mud-Terrain Tires: If you do a lot of off-roading on loose dirt or rough terrain, these tires will give you better grip.
• Highway-Terrain Tires: These are designed for mainly road driving, offering smoother rides and better fuel efficiency but may not perform as well on rough roads.

3. Check the Load and Performance Ratings

• Load Rating: Make sure the tire can handle the weight of your vehicle, especially if you carry heavy loads or tow trailers.
• Speed Rating: Ensure the tire is rated to perform at the speeds you drive, especially if you drive at higher speeds often.

4. Pick a Good Brand

• Choose trusted tire brands like Michelin, Goodyear, or Bridgestone for quality and reliability. Check if the tires come with a warranty for extra peace of mind.

5. Look for Durability

• Treadwear Rating: Tires with a higher treadwear rating last longer. Look for a tire that balances good performance with long-lasting durability.

6. Consider Your Budget

• Budget vs. Premium: While budget tires are cheaper, premium tires often offer better performance, last longer, and provide more safety features.
• Long-Term Value: Sometimes, spending a little more on quality tires saves you money in the long run since they last longer and perform better.

7. Get Them Installed and Maintained

• Installation: It’s best to have your tires installed by professionals to ensure they’re properly fitted.
• Maintenance: Regularly check tire pressure, alignment, and tread wear to keep your tires in good condition.

8. Make Sure They Fit Your Vehicle

• If you’re replacing your 285/70R17 tires with a different size, check that the new size is compatible with your vehicle.

9. Read Reviews

• Before buying, read customer reviews to see how the tires perform in real driving conditions. This can help you decide which tires are best for you.

By considering these factors, you can pick the right 285/70R17 tires that will work best for your vehicle and driving needs.

What People Are Saying About 285/70R17 Tires?

When it comes to buying 285/70R17 tires, it’s helpful to hear from other drivers to see how the tires perform in real-world conditions. Here’s a summary of what people are saying:

Positive Feedback

• Better Off-Road Performance: Many users report that the 285/70R17 tires improve their vehicle’s ability to handle rough terrain. They offer better traction and stability when driving on mud, gravel, or snow.
• Enhanced Comfort: The larger sidewall height helps absorb shocks, leading to a smoother ride on uneven roads. This is especially appreciated by off-road enthusiasts and truck owners.
• Great for Heavy Loads: Drivers who use their vehicles for towing or carrying heavy loads have noticed that the tires provide extra stability and support, making them ideal for tasks like hauling trailers or off-roading with heavy gear.
• Aggressive Look: The 285/70R17 tires give vehicles a rugged, powerful appearance, which is a major plus for many truck and SUV owners who like the tougher look.

Negative Feedback

• Fuel Efficiency Drop: Some drivers have noticed that their fuel efficiency decreases with the larger tires, as they take more energy to rotate. This is especially true for those who drive mostly on highways.
• Handling Issues: A few drivers mentioned that the larger tire size affects their vehicle’s handling, especially during sharp turns or high-speed driving. The higher sidewall height can lead to a slightly less stable feel.
• Cost and Modifications: Some users point out that installing 285/70R17 tires may require modifications to their vehicles, like lifting the suspension or recalibrating the speedometer, which can add to the overall cost.

Overall Impression

Overall, the 285/70R17 tires are highly rated by users for their off-road capabilities, traction, and the rugged look they provide. However, they may not be the best option for those who are looking for better fuel efficiency or superior handling on paved roads.

Conclusion

In conclusion, the review of the Falcon WildPeak MT 285/70R17 tires for the 2011 Tacoma is largely positive. The user is pleased with the tire’s performance, particularly in off-road conditions, as it provides excellent traction and stability. The aggressive look of the tire enhances the truck’s appearance, and the user is happy with the great deal they found on the tires. 

Despite a minor clearance issue in the front bumper and the increased road noise, the user feels that these tires are a great fit for their off-road needs and appreciates the added value they received. Overall, this is a positive review, with a few minor considerations that do not overshadow the overall satisfaction.

FAQs 

Q. How wide is a 285/70R17 tire?

The width of a 285/70R17 tire is 11.2 inches (285 mm).

Q. Can I fit 285/70R17 tires on my truck?

It depends on your vehicle and lift. Typically, 285/70R17 tires fit on trucks and SUVs with a 3-inch lift or more, and sometimes wheel spacers are needed.

Q. How long do 285/70R17 tires last?

The lifespan of 285/70R17 tires depends on driving conditions, maintenance, and tire type, but they generally last between 40,000 to 70,000 miles (64,000 to 112,000 km).

Q. How do I know if my vehicle can handle 285/70R17 tires?

Check your vehicle’s manufacturer specifications or consult a professional mechanic to ensure your vehicle has the proper clearance and suspension to handle 285/70R17 tires.

Q. Are 285/70R17 tires good for off-roading?

Yes, 285/70R17 tires are well-suited for off-roading due to their size, traction, and durability, especially in rugged terrains.