Tire Size 275/65r18 vs 35×12.50r18
Are you considering upgrading your 275/65r18 tires to a larger 35×12.50r18 size? While bigger tires can provide improved off-road performance and a more aggressive look, it’s important to understand the key differences and potential impacts before making the switch.
- Ground clearance increases by 1.48 inches, benefiting off-road performance
- Speedometer will read 8.4% slower than actual speed with the larger tires
- Taller sidewalls could slightly reduce on-road handling responsiveness
- Wider tread provides improved traction in loose or slippery off-road conditions
- Larger tires give an aggressive, bold aesthetic that appeals to many
275/65r18 vs 35×12.50r18
Fitment Guide
Replacing 275/65R18 tires requires matching the overall diameter within 3% to avoid clearance issues or speedometer inaccuracies.
The 35×12.50R18 is 9.2% larger in diameter, so it may require modifications like a suspension lift to fit correctly. The width is also 15.6% wider, which can cause rubbing without widening the wheel wells.
Gas Mileage
The 275/65r18 tires, being narrower and potentially lighter, typically offer better fuel efficiency due to reduced rolling resistance.
In contrast, the wider and larger 35×12.50r18 tires may decrease gas mileage owing to increased rolling resistance and weight. Vehicle owners prioritizing fuel economy might lean towards the 275/65r18 size.
Ground Clearance
Opting for 35×12.50r18 tires results in a notable increase in ground clearance, advantageous for off-road driving or navigating rough terrains.
However, this comes at the expense of speedometer accuracy. The smaller 275/65r18 tires may lower the vehicle, potentially increasing the risk of undercarriage damage but offer more accurate speedometer readings.
Ride Comfort
Larger tires like the 35×12.50r18 provide improved impact absorption due to their increased sidewall height, enhancing comfort on rough terrains.
Conversely, the 275/65r18 tires, with their lower profile, may offer a smoother ride on highways and urban roads, striking a balance between off-road capability and on-road comfort.
Speedometer Difference
At an actual speed of 20 mph, the 275/65r18 equipped vehicle’s speedometer will read 20 mph.
But with 35×12.50r18 tires, the speedometer will read around 21.84 mph at that actual speed due to the larger diameter. This speedometer discrepancy of nearly two mph is significant to note.
Aesthetics Look
Aesthetic preferences play a significant role in tire selection. The larger 35×12.50r18 tires offer a more aggressive stance, enhancing the vehicle’s rugged appeal, especially on trucks and SUVs.
The 275/65r18 tires maintain a more traditional look, favoring aerodynamics and a sleeker silhouette.
Handling & Stability
The handling dynamics differ significantly between these tire sizes. The 275/65r18 tires, being narrower, generally provide better handling and quicker steering response on paved surfaces.
On the other hand, the wider 35×12.50r18 tires offer improved stability and traction, especially on uneven off-road terrains.
Noise & Vibration
Noise and vibration levels are impacted by tire size and design. The 275/65r18 tires might offer a quieter ride on smooth roads but can transmit more vibrations from irregular surfaces.
The larger 35×12.50r18 tires, due to their increased air volume and sidewall height, can dampen road noise and vibrations, providing a more comfortable ride in varied conditions.
Durability & Wear
The durability and tread life of tires are influenced by their size and construction. Larger tires, like the 35×12.50r18, may endure more abuse and absorb impacts better, potentially leading to uneven wear or increased stress on vehicle components.
Smaller tires, such as the 275/65r18, might wear more evenly, offering longer tread life under normal driving conditions.
How Tall is a 275 65r18 Tire?
The 275/65r18 tire stands approximately 32.07 inches tall. This measurement combines the tire’s sidewall height and the diameter of the wheel to provide its total height.
Is a 275 70r18 a 35×12.50r18 Inch Tire?
No, a 275/70R18 tire is not the same as a 35×12.50R18 tire. While both are used on similar vehicles, the 275/70R18 typically measures about 33.2 inches in diameter.
Whereas the 35×12.50R18 is specifically designed to be approximately 35 inches in diameter, making them different in size.
What is the main difference between 275/65r18 and 35×12.50r18?
The primary difference between 275/65r18 and 35×12.50r18 tires lies in their overall diameter, with the 35×12.50r18 being a substantial 2.95 inches (9.2%) taller.
Can I use 35×12.50r18 instead of 275/65r18?
No, its not recommended. While you can use 35×12.50r18 tires, the significant 9.2% difference in diameter may require vehicle modifications to ensure proper fitment and avoid rubbing or clearance issues.
How Much Taller is a 35×12.50r18 Tire Than a 275/65r18?
A 35×12.50r18 tire is approximately 2.95 inches (74.98 mm) taller than a 275/65r18 tire, representing a 9.2% increase in overall diameter.
How Much Wider is a 35×12.50r18 Tire Than a 275/65r18?
A 35×12.50r18 tire is 1.69 inches (43 mm) wider than a 275/65r18 tire, which equates to a 15.6% increase in tire width.
Our Observations
While switching to 35×12.50r18 tires offers benefits for off-road use, it’s crucial to consider the potential drawbacks as well. The 9.2% difference in diameter exceeds the recommended 3% range, which means modifications may be necessary to ensure proper fitment without rubbing.
On-road, you may notice a slight reduction in handling responsiveness due to the taller sidewalls. The speedometer will also read about 8.4% slower than your actual speed, so keep that in mind to avoid unintended speeding.
For off-road enthusiasts, the improved ground clearance, traction, and durability can meaningfully enhance performance in challenging conditions. The aggressive look of the larger tires is also a significant appeal for many.
Ultimately, whether the benefits outweigh the drawbacks depends on your specific needs and priorities. If your vehicle sees a mix of on-road and off-road use, the 35×12.50r18 tires could be a worthwhile upgrade, as long as you’re prepared to make any necessary adjustments to accommodate the larger size.
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.