Tire Size 265/70r17 vs 33×12.5r17
Upgrading from 265/70R17 to 33×12.5R17 tires can significantly impact your vehicle’s performance, both on and off the road. While larger tires offer improved ground clearance and a more aggressive look, they also come with potential drawbacks.
- The diameter difference between 265/70R17 and 33×12.5R17 tires is -4.3%, exceeding the recommended 3% range.
- 33×12.5R17 tires are 1.42 inches taller and 2.09 inches wider than 265/70R17 tires.
- The speedo reading will be 19.14 mph when the actual speed is 20 mph.
- On-road performance may be affected, including reduced fuel efficiency and altered handling.
- Off-road capabilities can be enhanced with improved ground clearance and traction.
265/70r17 vs 33×12.5r17 Table
The most significant difference between 265/70R17 and 33×12.5R17 tires is the overall diameter. 33×12.5R17 tires are 1.42 inches taller than 265/70R17 tires.
Fitment Guide
As the diameter difference between 265/70R17 and 33×12.5R17 tires exceeds the acceptable 3% range, this interchange is not recommended without necessary adaptations. Proceeding with the switch may lead to rubbing or clearance issues.
On-Road Impact
Switching to 33×12.5R17 tires can have a noticeable impact on your vehicle’s on-road performance. Let’s take a closer look at the potential changes you may experience.
- Gas Mileage: The larger 33×12.5R17 tires will likely decrease your vehicle’s fuel efficiency due to increased rolling resistance and weight. The -4.3% difference in tire diameter can result in a lower overall gear ratio, causing your engine to work harder to maintain the same speed.
- Ride Comfort: The taller sidewalls of 33×12.5R17 tires may provide a slightly smoother ride on rough roads, as they can absorb more vibrations. However, the wider tread may cause increased road noise and a less precise steering feel.
- Speedometer Accuracy: With the larger 33×12.5R17 tires, your speedometer will read slower than your actual speed. At a speedo reading of 20 mph, your actual speed will be 19.14 mph, which is a 4.5% difference. Keep this in mind to avoid unintentional speeding.
- Handling: The wider tread of 33×12.5R17 tires can provide better stability and grip on dry roads. However, the taller sidewalls may lead to increased body roll and less responsive handling compared to the 265/70R17 tires.
Off-Road Impact
If you frequently take your vehicle off-road, switching to 33×12.5R17 tires can offer several advantages. Here’s what you can expect:
- Ground Clearance: The taller 33×12.5R17 tires will raise your vehicle’s ground clearance by approximately 0.71 inches. This can be beneficial when navigating rough terrain, helping you avoid obstacles and reduce the risk of undercarriage damage.
- Traction: The wider tread of 33×12.5R17 tires will provide better traction on loose surfaces like mud, sand, and gravel. The larger contact patch and more aggressive tread pattern can help you maintain better control and overcome challenging obstacles.
- Durability & Wear: 33×12.5R17 tires are generally designed for off-road use and may feature reinforced sidewalls and more robust construction. This can lead to increased durability and longevity when subjected to the rigors of off-road driving.
- Aesthetics: Many off-road enthusiasts prefer the aggressive look of larger tires. Switching to 33×12.5R17 tires can give your vehicle a more rugged and capable appearance, which may be desirable for those who value the off-road aesthetic.
What is the Difference Between 33×12.5R17 and 265/70R17?
The main difference between 33×12.5R17 and 265/70R17 tires is the overall diameter. The 33×12.5R17 tire has a diameter of 33.03 inches (838.84 mm), while the 265/70R17 tire has a diameter of 31.61 inches (802.8 mm).
This means that the 33×12.5R17 tire is 1.42 inches (36.04 mm) taller than the 265/70R17 tire, which equates to a -4.3% difference in diameter. This difference in size can significantly impact the vehicle’s performance, handling, and speedometer accuracy.
Can I Use 33×12.5R17 Instead of 265/70R17?
It is not recommended to use 33×12.5R17 tires instead of 265/70R17 tires. The diameter difference between these two sizes is -4.3%, which exceeds the generally accepted 3% range.
Using tires with a diameter difference greater than 3% can lead to issues such as incorrect speedometer readings, altered handling characteristics, and potential rubbing or clearance problems.
If you still want to make the switch, it is essential to consult with a professional and make necessary modifications to your vehicle to accommodate the larger tires safely.
How Much Taller Is a 33×12.5R17 Tire Than a 265/70R17?
A 33×12.5R17 tire is 1.42 inches (36.04 mm) taller than a 265/70R17 tire. The overall diameter of the 33×12.5R17 tire is 33.03 inches (838.84 mm), while the overall diameter of the 265/70R17 tire is 31.61 inches (802.8 mm).
To calculate the difference in height, simply subtract the diameter of the 265/70R17 tire from the diameter of the 33×12.5R17 tire: 33.03 inches – 31.61 inches = 1.42 inches.
How Much Wider is a 33×12.5R17 Tire Than a 265/70R17?
A 33×12.5R17 tire is 2.09 inches (53 mm) wider than a 265/70R17 tire. The width of the 33×12.5R17 tire is 12.52 inches (318 mm), while the width of the 265/70R17 tire is 10.43 inches (265 mm).
Our Observations
While switching from 265/70R17 to 33×12.5R17 tires offers some benefits, particularly for off-road use, it’s essential to consider the potential drawbacks. The -4.3% difference in tire diameter falls outside the recommended range and may necessitate modifications to your vehicle to ensure proper fitment and clearance.
On the road, you may experience reduced fuel efficiency, altered handling characteristics, and inaccurate speedometer readings. However, the differences in ride comfort and stability may be less noticeable to the average driver.
Off-road, the larger 33×12.5R17 tires can significantly improve ground clearance and traction, making them a popular choice for those who frequently tackle challenging terrains. The increased durability and aggressive appearance are also appealing factors for off-road enthusiasts.
Ultimately, the decision to switch from 265/70R17 to 33×12.5R17 tires depends on your specific needs and priorities. If off-road performance is your primary concern and you’re willing to make the necessary modifications to your vehicle, the larger tires may be a worthwhile investment.
However, if you primarily drive on paved roads and value fuel efficiency and precise handling, sticking with the 265/70R17 tires may be the better choice.
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.