285/75r18 vs 35×12 5r18 Tire Size

Things like tread depth, wet traction, and noise emission may not be as exciting as how many horsepower your preferred tire will give you, but they can be just as important. Whether you’re looking for a more off-road-friendly tire or something that’s great for city driving or anything in between there is an ideal tire for every need and situation.

The tricky part is identifying exactly what those needs and situations are before investing in new tires. But don’t worry; we’ve got you covered.

285 75r18 vs 35×12 5r18 Table

What Does 285 75r18 Tire Mean?

The 285 75r18 tire size is a common choice for trucks and SUVs. The “285” refers to the tire’s width in millimeters, while the “75” indicates that the sidewall is 75% as tall as the width. The “r18” means that this is a radial tire with an 18-inch diameter.

What Does 35×12 5r18 Tire Mean?

The “35” in the 35×12 5r18 tire size refers to the height of the tire. The “12.50” indicates that the width of the tire is 12.50 inches, and the “r18” means that it is a radial tire with an 18-inch diameter.

Tire Diameter
Tire diameter is also called the “tall” of the tire. This is the measurement from one side of the tire to the other, through the center. The 285 75r18 tires have a diameter of 34.83 inches, while the 35×12.50r18 tires have a diameter of 35 inches. The difference between those two tires sie is 0.2 inches or 0.6%.

Section Width
Section width is the measurement of the width of the tire from one sidewall to the other. The 285 in 285 75r18 means that the width of the tire is 285 mm, or 11.22 inches. The 12.50 in 35×12.50r18 implies that the width of the tire is 12.50 inches. So, the 35×12.50r18 tires are wider than the 285 75r18 tires by 1.3 inches or 11.6%.

Circumference
To calculate this, you would take the tire’s diameter and multiply it by pi. 285 75r18 tires have a circumference of 109.42 inches, and 35×12.50r18 tires have a circumference of 110.04 inches. This means that the 35×12.50r18 tires are 0.62 inches larger in circumference than the 285 75r18 tires.

Revolutions Per Mile
This is how many times the tire will go around in a mile. To calculate this, you take the tire’s circumference and divide it by pi. This means that the 285 75r18 tires will go around 579 times in a mile, while the 35×12.50r18 tires will go around 575 times in a mile.

So, the 35×12.50r18 tires are slightly better in this category. Overall, the 285 75r18 tires are wider, have a somewhat larger circumference, and will go around the block more times in a mile than the 285 75r18 tires.

Sidewall Height
The sidewall height is how tall the tire is from the edge of the tread to the wheel well. The taller the sidewall, the more flexible the tire will be. This can give you a smoother ride, but it also means that the tire is more likely to get damaged by obstacles on the road.

The sidewall height of the 285 75r18 tires is 8.42 inches, while the sidewall height of the 35×12.50r18 tires is 8.51 inches. This means that the 35×12.50r18 tires are taller by about 0.1 inches or 1.2%.

Wheel Size
The wheel size is the diameter of the wheel that the tire is mounted on. The 285 75r18 tires are typically mounted on 18-inch wheels, while the 35×12.50r18 tires are mounted on 18-inch wheels. This means that both of these sizes will fit on the same size wheel.

Construction Type
The construction type of a tire refers to how the tire is made. The 285 75r18 tires are radial tires, while the 35×12.50r18 tires are also radial tires. This means that both of these sizes are made with the same construction type.

Our Observation
The main difference between 285 75r18 and 35×12 5r18 tire sizes is in the section width. 35×12 5r18 tire size is 1.3 inches or 11.6% wider than 285 75r18 tire size. Also, 35×12.50r18 tires are 0.62 inches larger in circumference than the 285 75r18 tires and will go around the block more times in a mile.

Conclusion
Both of these sizes are radial tires and will fit on the same size wheel. The main difference is in the width of the tire. If you are looking for a wider tire, then the 35×12.50r18 is the better choice. I hope this helps you in your decision-making! Please feel free to contact us if you have any further questions. Thank you for choosing.

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