The 255/75R17 tire size comes in at 32 inches (814 mm) in overall height, with a tread width of 10 inches (255 mm) and a 17-inch (431.8 mm) wheel fitment. Its 7.5-inch (191 mm) sidewall supports both comfort and durability, while a circumference of 100.5 inches (2556 mm) delivers roughly 630 revolutions per mile (391 per km).
Favored for light trucks, SUVs, and off-road vehicles, this tire size offers a reliable blend of traction, stability, and everyday drivability. From smooth highway rides to rugged trails, the 255/75R17 adapts well to a variety of driving conditions.
You can explore more about various tire sizes here.
Key Dimensions of 255/75R17 Tires
When considering the 255/75R17 tire size, it’s important to understand the key dimensions that determine its performance and compatibility with your vehicle. Below is a table summarizing the main dimensions of this tire.
| Dimension | Inches | Millimeters |
| Circumference | 100.5″ | 2556 mm |
| Sidewall Height | 7.5″ | 191 mm |
| Wheel Diameter | 17″ | 431.8 mm |
| Tread Width | 10″ | 255 mm |
| Overall Diameter | 32″ | 814 mm |
| Revolutions per Mile | 630 | 391 per km |
This table provides an overview of the 255/75R17 tire’s essential measurements, which are crucial for understanding its fit, ride quality, and performance on various terrains.
What is the 255/75R17 Tire Size?
The tire size 255/75R17 is a standard size commonly found on trucks and SUVs, offering a great balance of performance, comfort, and off-road capability. Here’s the breakdown:
- 255: This represents the width of the tire in millimeters (255 mm), or approximately 10 inches.
- 75: This is the aspect ratio, meaning the height of the tire’s sidewall is 75% of the tire’s width (about 191 mm or 7.5 inches).
- R: The letter R indicates the tire’s construction type. In this case, R stands for Radial, the most common construction type for modern tires.
- 17: The number 17 refers to the diameter of the wheel rim that the tire fits on, in inches. This tire is designed for 17-inch wheels.
These specifications define how the tire will perform in different conditions and determine the vehicle’s handling, comfort, and safety.
How to Convert 255/75R17 Tire Size into Inches?
Understanding tire sizes can be a bit challenging, but converting 255/75R17 into inches is fairly straightforward:
- Width: 255 mm ÷ 25.4 = 10 inches
- Sidewall Height: 75% of 10 inches (width) = 7.5 inches
- Wheel Diameter: 17 inches
This gives us a tire that is 10 inches wide, with a 7.5-inch sidewall height, and designed to fit a 17-inch wheel. Converting the tire size into inches helps in visualizing its overall fit and compatibility with your vehicle.
Understanding Tire Speed Ratings for 255/75R17 Tires
A crucial factor in tire selection is the speed rating, which indicates how fast the tire can safely handle sustained speeds. Common speed ratings for 255/75R17 tires include:
- Q-Rated: Can sustain speeds of up to 100 mph. This rating is typically found on tires designed for SUVs and light trucks that see consistent highway use.
- T-Rated: Can handle up to 118 mph, suitable for vehicles with higher performance demands.
When selecting a tire, make sure to match the speed rating with your vehicle’s manufacturer recommendations for safety and optimal performance.
Comparing 255/75R17 to Other Tire Sizes
When choosing the right tire size for your vehicle, it’s essential to understand how different tire sizes compare to each other in terms of performance, fuel efficiency, and handling characteristics. The 255/75R17 tire is a popular option, but how does it compare to other commonly used sizes like the 265/70R17 and the 285/70R17? Let’s break down these comparisons in detail to help you make an informed decision.
255/75R17 vs 265/70R17: How They Compare
| Feature | 255/75R17 | 265/70R17 |
| Width | 10.04 inches | 10.43 inches |
| Sidewall Height | 7.5 inches | 7.39 inches |
| Overall Diameter | 32 inches | 31.61 inches |
| Ride Comfort | Balanced, with good comfort | Slightly firmer ride due to shorter sidewall |
| Fuel Efficiency | Slightly better | Slightly worse due to slightly wider tire |
| Off-Road Performance | Good traction, stable handling | Better off-road grip due to wider tire and lower profile |
| Key Takeaways | Offers a great balance for on-road and off-road use | Slightly wider, better grip, but may impact fuel efficiency and comfort |
The 265/70R17 tire is slightly wider, providing better traction, especially in off-road conditions, but the overall diameter is a little smaller, affecting the ride comfort slightly. The 255/75R17 tire offers better fuel efficiency due to its narrower profile and higher sidewall, making it a great all-around choice for both off-road and highway driving.
255/75R17 vs 285/70R17: How They Compare
| Feature | 255/75R17 | 285/70R17 |
| Width | 10.04 inches | 11.22 inches |
| Sidewall Height | 7.5 inches | 8.0 inches |
| Overall Diameter | 32 inches | 32.7 inches |
| Ride Comfort | Balanced, with good comfort | Slightly softer due to larger sidewall |
| Fuel Efficiency | Slightly better | Slightly worse due to the increased width and diameter |
| Off-Road Performance | Excellent traction and stability | Superior off-road performance due to wider tire and taller sidewall |
| Key Takeaways | Balanced for daily driving and moderate off-road use | Offers superior grip and off-road performance but may decrease fuel efficiency and ride comfort |
The 285/70R17 tire is significantly wider and offers better off-road traction due to its larger contact patch. The added sidewall height enhances off-road performance by providing more flex over rough terrain. However, it comes with trade-offs in terms of fuel efficiency and ride comfort, making it a better choice for heavy off-roading rather than everyday use.
Top All-Terrain Tires in 255/75R17
All-terrain tires offer the perfect balance between off-road capability and on-road comfort. Here are some of the best 255/75R17 all-terrain tires for those who need versatility in different driving conditions:
1. BFGoodrich All-Terrain T/A KO2
Renowned for its durability and exceptional off-road capabilities, the KO2 features a tough sidewall and aggressive tread pattern, making it ideal for rugged terrains.
2. Goodyear Wrangler DuraTrac
This tire offers excellent traction in mud and snow, thanks to its self-cleaning tread design. It’s a favorite among off-road enthusiasts for its versatility.
3. Falken Wildpeak A/T3W
Designed for all-weather performance, the A/T3W provides a quiet ride on highways and reliable grip on off-road trails, making it a balanced choice for various driving conditions.
4. Firestone Destination A/T2
With a focus on comfort and longevity, the Destination A/T2 delivers a smooth ride while maintaining solid off-road performance, suitable for daily driving and weekend adventures.
5. Toyo Open Country A/T III
Offering a blend of rugged off-road capability and on-road comfort, the A/T III is designed for long-lasting performance, even in challenging conditions.
Common Vehicles That Use 255/75R17 Tires
Many popular vehicles come equipped with 255/75R17 tires or offer them as an option, especially in the SUV and truck categories. These tires are often found on models such as:
- Ford Bronco (2021–2025)
- Jeep Wrangler (2007–2018)
- Toyota 4Runner
- Ram 1500 (with appropriate suspension setups)
Additionally, the 255/75R17 size is often selected for off-road-ready vehicles due to its compatibility with larger wheels and its ability to provide a higher ground clearance, offering better performance in rugged conditions.
For more information on tire repairs, don’t hesitate to check out our tire repair services.
FAQs
Q. How tall is a 255/75R17 tire?
A 255/75R17 tire has an overall diameter of approximately 32 inches (814 mm).
Q. How wide is a 255/75R17 tire?
The width of the 255/75R17 tire is 10 inches (255 mm), which is ideal for providing stability and a larger contact patch for better traction.
Q. Can I upsize to a larger tire?
Yes, you can upsize, but ensure the new tire’s diameter is within 3% of the original tire size. For example, tires like 235/75R17 or 265/70R17 would be suitable options.
