245/70r17 vs 285/70r17 Tire Size
When it comes to tires, one size does not fit all. What works for one vehicle may not work well for another. That’s because there are several ways to measure tire size and tread depth.
You might even come across odd-sounding tire sizes like 245 70r17 and 285 70r17. Does that mean one of these tire sizes is better than the other? Let’s look at these two common tire sizing measurements to find out.
245 70r17 vs 285 70r17 Table
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What Does 245 70r17 Tire Mean?
The 245 70r17 tire size means that the tire’s width is 245 millimeters. The 70 indicates that the aspect ratio is 70%. This means that the tire’s height is 70% of the width.
The “R” in this case, stands for radial, which is the most common type of tire. The 17 is the diameter of the wheel in inches. This particular size is often used on SUVs and light trucks. It offers a good balance of comfort and handling.
Tire Diameter
The larger the diameter, the taller the tire. A taller tire will have a larger contact patch with the ground, providing better traction. It can also give the vehicle a smoother ride. The tire diameter is 285 70r17, the Tire Size is 32.71 inches, and the tire diameter is 245 70r17 Tire Size is 30.5 inches.
The 285 70r17 is larger tire size so it will have a taller profile and a larger contact patch. This can provide better traction and a smoother ride. However, the larger size can also cause speedometer inaccuracy.
The 245 70r17 is smaller tire size so it will have a shorter profile and a smaller contact patch. This can provide better handling and fuel economy. However, the smaller size may cause the ride to be less comfortable.
Section Width
The section width is the width of the tire from sidewall to sidewall. The wider the tire, the more contact it will have with the ground. This can provide better traction, but it can also increase rolling resistance.
The section width of the 245 70r17 tires is 245 millimeters, and the section width of the 285 70r17 tires is 285 millimeters. The wider 285 70r17 tires will have more contact with the ground. This can provide better traction, but it can also increase rolling resistance.
Circumference
The circumference is the distance around the outside of the tire. The larger the circumference, the longer the distance the tire will travel with each revolution. This can cause the speedometer to read higher than the actual speed.
The circumference of the 245 70r17 tires is 2434.11 millimeters, and the circumference of the 285 70r17 tires is 2610.04 millimeters. The larger circumference of the 285 70r17 tires will cause the speedometer to read higher than the actual speed.
Revolutions Per Mile
The revolutions per mile are the number of times the tire will rotate in one mile. The higher the number, the shorter the distance the tire will travel in one mile. The lower the number, the longer the distance the tire will travel in one mile.
The revolutions per mile of the 245 70r17 tires are 661, and the revolutions per mile of the 285 70r17 tires are 616. The lower number for the 285 70r17 tires means the tire will travel a longer distance in one mile.
Sidewall Height
The sidewall height is the distance from the edge of the rim to the top of the tread. The taller the sidewall, the more cushioning the tire will have. This can provide a smoother ride, but it can also cause the tire to be less stable.
The sidewall height of the 245 70r17 tires is 171.5 millimeters, and the sidewall height of the 285 70r17 tires is 199.5 millimeters. The taller sidewall of the 285 70r17 tires will provide more cushioning and a smoother ride. However, the taller sidewall can also cause the tire to be less stable.
Wheel Size
Rim size is the diameter of the wheel in inches. The larger the rim size, the smaller the tire will look. The wheel size of the 245 70r17 tires is 17 inches, and the wheel size of the 285 70r17 tires is also 17 inches. Both tire sizes have the same wheel size.
Construction Type
The construction type is the way the tire is made. The most common construction type is radial. Radial tires have belts that go around the circumference of the tire. This provides a smoother ride and better fuel economy.
The construction type of the 245 70r17 tires is radial, and the construction type of the 285 70r17 tires is also radial. Both tire sizes have the same construction type.
Our Observation
The main difference between 245 70r17 and 285 70r17 tire size is in the section width. The section width of the 245 70r17 is 245 millimeters, and the section width of the 285 70r17 is 285 millimeters. The wider 285 70r17 tires will have more contact with the ground.
Conclusion
After observing and comparing the 245 70r17 and 285 70r17 tire sizes, we can conclude that the 285 70r17 tires are better regarding section width and circumference. So, it depends on what you are looking for in tire size.
If you want better traction and more contact with the ground, then go with the 285 70r17 tires. If you want a tire that will travel a longer distance in one mile, then go with the 245 70r17 tires. Whichever tire size you choose, ensure it is the right size for your vehicle.
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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.
