Tire Size 275/65r18 vs 35×12.50r18

The main difference between 275/65r18 and 35×12.50r18 tires is in the section width. The 275/65r18 tire is narrower with a width of 10.83 inches, while the 35×12.50r18 measures 12.52 inches wide.

This variation affects various aspects of vehicle performance, including gas mileage, ride comfort, and ground clearance, impacting the vehicle’s overall driving experience.

Tire 1 Front View
Tire 2 Front View
Tire 1 Side View
Tire 1 Wheel
circumference 1
Tire 2 Side View
Tire 2 Wheel
/ R
/ R
Parameter235/35 R18205/40 R18Differ.
Tire Height
Section Width
Sidewall Height
Rim Size

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.

Tire Size 35x12.5R18

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.

35x12.50r18 vs 275/65r18

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.

Our Observation
In summary, the choice between 275/65r18 and 35×12.50r18 tires involves a trade-off among various factors including fitment, fuel efficiency, ground clearance, comfort, aesthetics, handling, noise, and durability.

Vehicle owners must weigh these considerations based on their driving habits, performance expectations, and aesthetic preferences to select the tire size that best fits their needs.

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