Tire Size 285/75r17 vs 315/70r17
Changing your vehicle’s tire size from 285/75R17 to 315/70R17 is a popular modification that can enhance your ride’s appearance and off-road capabilities. However, it’s essential to understand the differences between these tire sizes and how they may affect your vehicle’s performance, both on and off the road.
- Switching from 285/75R17 to 315/70R17 tires increases the tire width by 1.18 inches (30 mm)
- The overall diameter decreases by 0.53 inches (13.5 mm), which is within the acceptable range of ±3%
- The speedometer reading will be slightly affected, with the actual speed being lower than the indicated speed
- The wider tires may provide improved traction and stability off-road but could impact fuel efficiency on-road
285/75r17 vs 315/70r17 Table
The main difference between 285/75R17 and 315/70R17 tires is the width, with the 315/70R17 tire size is 1.18 inches (30 mm) wider than the 285/75R17.
Fitment Guide
When considering switching from 285/75R17 to 315/70R17 tires, it’s crucial to ensure that the overall diameter difference falls within the acceptable range of 3%.
In this case, the diameter difference is -1.5%, which is within the acceptable limits. As a result, the interchange is recommended without requiring significant adaptations.
On-Road Impact
Switching to wider 315/70R17 tires can have various effects on your vehicle’s on-road performance. Here are some key aspects to consider:
- Gas Mileage: The wider tires may cause a slight decrease in fuel efficiency due to increased rolling resistance.
- Ride Comfort: The wider tires might result in a firmer ride, as they have a shorter sidewall compared to the 285/75R17 tires.
- Speedometer Accuracy: The speedometer reading will be affected, with the actual speed being approximately 0.31 mph (0.5 km/h) slower than indicated at 20 mph (32.19 km/h).
- Handling: The wider tires can provide improved stability and cornering performance, especially in dry conditions.
Off-Road Impact
When it comes to off-road performance, switching to 315/70R17 tires can offer several benefits:
- Traction: The wider tires provide a larger contact patch with the ground, enhancing traction on various terrains.
- Durability: The wider tires may offer increased durability and resistance to punctures, which is beneficial for off-road adventures.
- Ground Clearance: Although the overall diameter is slightly smaller, the difference in ground clearance is negligible and shouldn’t significantly affect off-road capabilities.
- Aesthetics: The wider tires give your vehicle a more aggressive and rugged appearance, which is popular among off-road enthusiasts.
What is the Difference Between 315/70R17 and 285/75R17?
The main difference between 315/70R17 and 285/75R17 tires is the width. A 315/70R17 tire is 1.18 inches (30 mm) wider than a 285/75R17 tire.
The wider 315/70R17 tire may provide better traction and stability, especially in off-road conditions, but may also result in increased rolling resistance and potentially lower fuel efficiency.
Can I Use 315/70R17 Instead of 285/75R17?
Yes, you can use 315/70R17 tires instead of 285/75R17 tires. The overall diameter difference between these two sizes is approximately -0.53 inches (-13.5 mm) or -1.5%, which falls within the generally accepted range of 3%.
This means that switching from 285/75R17 to 315/70R17 tires should not significantly affect your vehicle’s speedometer accuracy, handling, or overall performance.
How Much Taller Is a 315/70R17 Tire Than a 285/75R17?
A 315/70R17 tire is actually shorter than a 285/75R17 tire by approximately 0.53 inches (13.5 mm). The overall diameter of a 315/70R17 tire is 34.36 inches (872.8 mm), while the overall diameter of a 285/75R17 tire is 33.83 inches (859.3 mm).
Despite the wider width of the 315/70R17 tire, its aspect ratio (70) is lower than that of the 285/75R17 tire (75), resulting in a slightly shorter sidewall and overall diameter.
How Much Wider is a 315/70R17 Tire Than a 285/75R17?
A 315/70R17 tire is 1.18 inches (30 mm) wider than a 285/75R17 tire. The width of a 315/70R17 tire is 12.4 inches (315 mm), while the width of a 285/75R17 tire is 11.22 inches (285 mm).
This difference in width can provide a more aggressive and wider stance for your vehicle, which may be particularly beneficial for off-road performance and handling.
Our Observations
Based on the data provided, switching from 285/75R17 to 315/70R17 tires offers several benefits for off-road performance, such as improved traction and durability.
The wider tires also give your vehicle a more aggressive look, which many off-road enthusiasts prefer. However, it’s essential to consider the potential impact on fuel efficiency and ride comfort when driving on paved roads.
The speedometer reading will also be slightly affected, but the difference is relatively small and can be easily accounted for.
Overall, the differences between these tire sizes are within acceptable ranges, making the switch a viable option for those seeking enhanced off-road capabilities without significant drawbacks.
Meet Caitlin McCormack, a Tire Size Expert and Blogger Passionate About Everything Related to Tires. With Years of Experience in the Tire Industry, Caitlin Has Become an Expert in Tire Sizes and Their Impact on Vehicle Performance.