285/70r17 vs 315/70r17 Tire Size

285 70r17 vs 315 70r17

The size of tires is almost as important as their tread in determining how well your vehicle handles on wet or dry roads. Different tire sizes have other implications for both performance and fuel economy. 

This is why it’s helpful to understand the differences between standard and optional dimensions. This blog post will discuss the differences between these two sizes and help you decide which one is right for you.

285 70r17 vs 315 70r17 Table

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What Does 315 70r17 tire Mean?

The 315 70r17 tire size is a metric tire. The first number, 315, refers to the tire’s width in millimeters. The second number, 70, refers to the aspect ratio. This is the height of the sidewall as a percentage of the width.

In this case, the sidewall is 70% of the tire’s width. The R, in this instance, stands for radial construction, and the 17 refers to the diameter of the wheel in inches. This tire size is commonly used on full-size trucks and SUVs.

Tire Diameter
One important thing to note about the 315 70r17 tire size is that it has a larger diameter than the 285 70r17. This is also called the “tall” of the tire. The taller the tire, the more ground it will cover. The larger diameter also makes the tire more stable at high speeds.

The 315 70r17 tire size diameter is 34.36 inches, and the 285 70r17 tire size is 32.71 inches. The difference between those two sizes might not seem like much, but it can significantly affect how your vehicle handles.

Section Width
The section width of a tire is the width from one sidewall to the other. The 315 70r17 tire size has a section width of 12.40 inches. The 285 70r17 tire size has a section width of 11.22 inches. That means the 315 70r17 is about 10.5% wider than the 285 70r17.

A wider tire will have more contact with the road, which can improve traction. It can also make the ride smoother because there are more contact points. However, a wider tire can also be more susceptible to punctures and more challenging to mount.

Circumference
The circumference of a tire is the distance around the outside of the tire. The 315 70r17 tire size has a circumference of 107.95 inches. The 285 70r17 tire size has a circumference of 102.76 inches. That means the 315 70r17 is about 5.1% wider than the 285 70r17 tire size.

A larger circumference means the tire will cover more ground with each revolution. This can improve traction but also make the ride rougher because there is more contact with the ground.

Revolutions Per Mile
The number of revolutions per mile (RPM) measures how far the tire will travel in one mile. The 315 70r17 tire size has an RPM of 586. The 285 70r17 tire size has an RPM of 616.

The RPM can be affected by the vehicle’s weight, tire load, and inflation pressure. A higher RPM can mean that the tire will wear out faster, but it can also mean that the ride is smoother.

Sidewall Height
The sidewall height is the distance from the edge of the tire to the wheel. The 315 70r17 tire size has a sidewall height of 8.68 inches. The 285 70r17 tire size has a sidewall height of 7.85 inches. That means the 315 70r17 is about 10.5% taller than the 285 70r17.

A taller sidewall can provide a smoother ride because it acts as a shock absorber. It can also make the tire more resistant to punctures. However, a taller sidewall can also make the tire more challenging to handle.

Wheel Size
The wheel size is the diameter of the wheel that the tire is mounted on. The 315 70r17 tire size is typically mounted on a 17-inch wheel. The 285 70r17 tire size is typically mounted on a 17-inch wheel. Both wheel sizes are the same.

The wheel size can affect the way the tire performs. A larger wheel can improve traction and handling, but it can also make the ride rougher. A smaller wheel can make the ride smoother but also make the tire more susceptible to punctures.

Construction Type
The construction type of a tire is the way the layers of the tire are put together. The r in 315 70r17 and 285 70r17 stands for radial construction. This is the most common tire construction type used on most passenger vehicles.

Radial tires have layers that run perpendicular to the direction of travel. This gives the tire a more flexible sidewall, which can improve handling. Radial tires can also dissipate heat better, which can improve fuel economy.

Our Observation
The main difference between 315 70r17 and 285 70r17 tire size is in the section width. The 315 70r17 tire size is 1.18 inches or 10.5% wider 285 70r17 tire size.

If you are looking for a wider tire, go for 315 70r17. A wider tire will have more contact with the road, which can improve traction. It can also make the ride smoother because there are more contact points.

Conclusion
The 315 70r17 tire size is a good choice for a wider tire. It can improve traction and make the ride smoother. However, it can also be more susceptible to punctures and more challenging to mount.

The 285 70r17 tire size is a good choice for a smaller tire. It can be easier to mount and can be less susceptible to punctures. However, it can make the ride rougher because there are fewer points of contact.

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