# What Size is 315 70r17?

315 70r17 is a size of tire. The 315 is the width in mm, 70 is the sidewall height as a percentage of the width, and 17 is the wheel diameter in inches.

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## Measuring Tire Diameter

315 70r17 tires have a diameter of about 33.5 inches. That’s 863.6 millimeters for those of you who prefer the metric system. To put that into perspective, a basketball is about 24 inches in diameter, or 60 centimeters. These tires are designed for trucks and SUV’s and provide a good balance of traction, comfort, and durability.

### Use a tape measure

To measure your tire diameter, you will need a tape measure. You will also need to know the width of your tire in inches. To measure the width of your tire, simply measure from one side of the tire to the other at the widest point.

Now that you know the width of your tire, you can measure the diameter. To do this, simply place the tape measure around the circumference of the tire. The diameter of your tire is the distance around the entire tire.

Now that you know how to measure tire diameter, you can use this information to find out what size your tires are. Just remember that the width is measured in inches and the diameter is measured in feet.

### Find the sidewall

To find the sidewall of the tire, look for a long number printed on the side of the tire. This number is composed of two sections. The first section is the width of the tire in millimeters. The second section is the aspect ratio, which is a percentage. To find the diameter of the tire, multiply the width by the aspect ratio.

### Measure the distance from the edge of the rim to the top of the tire

The first step in measuring tire diameter is to measure the distance from the edge of the rim to the top of the tire. This measurement is called the “tire height.” To get an accurate measurement of your tire height, it’s important to make sure that your tape measure is level.

Next, you’ll need to measure the distance around the tire. This measurement is called the “tire circumference.” To get an accurate measurement of your tire circumference, it’s important to make sure that your tape measure is level.

Once you have both measurements, you can calculate the diameter of your tire by dividing the circumference by 3.14 (pi).

For example, if your tire has a circumference of 100 inches and a height of 10 inches, your calculation would look like this:

100 ÷ 3.14 = 31.8 inches

This means that your tire has a diameter of 31.8 inches.

## Measuring Tire Width

315 70r17 is a common tire size. The first number, 315, is the width of the tire in millimeters. The second number, 70, is the percent of the width that is the sidewall height. The last number, 17, is the diameter of the wheel in inches. Now that you know how to read a tire size, let’s talk about how width affects tire performance.

### Use a tape measure

To get an accurate measurement of your tire width, you will need to use a tape measure. You will want to measure from the outermost edge of the tire tread on one side to the outermost edge of the tire tread on the other side. This measurement will give you the width of your tire in millimeters. To convert millimeters to inches, divide the number of millimeters by 25.4. The width of a 315 70r17 tire is 315 mm wide, or 12.4 inches wide.

### Find the sidewall

Start by finding the sidewall of the tire. This is the part of the tire between the bead and the tread. The width will be indicated with a series of numbers after the letter “W.” In this example, “315” is the width in millimeters.

![tire width example]( 315-70R17-tire-width.jpg)

### Measure the distance from one side of the tire to the other

To measure the width of your tire, you will need to take a tape measure and place it on the sidewall of the tire. You will want to start at the point where the bead of the tire meets the rim and then measure to the opposite side of the tire. The bead is the thick rubber border that holds the tire onto the wheel. The width will be measured in millimeters and will be listed on the sidewall as 315 mm for example.

## Measuring Tire Sidewall Height

sidewall height is determined by measuring the distance from the wheel rim to the top of the tread. The purpose of this measurement is to give the consumer an idea of how big the tire is when it is installed on the vehicle. The sidewall height will affect the tire’s diameter and width. A tire with a taller sidewall will have a smaller diameter and a wider width.

### Use a tape measure

To measure the sidewall height of a tire, you will need to use a tape measure. To do this, start by placing the end of the tape measure at the bottom of the tire, where it meets the wheel. Then, run the tape measure up the side of the tire to the point where it meets the top of the tread. Make sure to take a measurement at both the left and right sides of the tire, and then take an average of the two measurements. The number that you get is your sidewall height.

### Find the sidewall

The sidewall is the part of the tire that connects the tread to the bead. It’s where you’ll find all of the important information about your tire, including the width, height, load index, speed rating, and more.

To find your sidewall height, look for a series of numbers on the side of your tire. The first number is the width of the tire in millimeters. The second number is the aspect ratio, which is the height of the tire sidewall as a percentage of the width. The third number is the diameter of the wheel in inches.

For example, if you see a series of numbers that looks like this: 315/70R17, that means your tire has a width of 315 millimeters, a sidewall height of 70% of 315 (221mm), and a 17-inch diameter wheel.

### Measure the distance from the edge of the rim to the top of the tire

To measure the sidewall height of a tire, you will need to find the distance from the edge of the rim to the top of the tire. This can be done by using a ruler or a tape measure. The sidewall height is generally expressed in millimeters and is usually between 60 and 80 mm.

If you are unsure of the size of your tires, you can usually find this information on the side of the tire, on the doorjamb of your vehicle, or in your owner’s manual. Once you know the size of your tires, you can use this information to calculate the sidewall height.

Here is an example:

If you have a 315 70r17 tire, this means that your tire has a sidewall height of 70% of 315 mm, or 221 mm. To calculate this, simply multiply 70% by 315 mm, which gives you 221.5 mm. You can then round this number up or down to get your final measurement.

Now that you know how to measure sidewall height, you can use this information to choose tires that will fit your vehicle and give you the ride feel that you desire.

## Measuring Tire Circumference

One method of measuring tire circumference is by using a flexible tape measure. If you don’t have a flexible tape measure, you can use a piece of string or a cord. Place the string or cord around the center of the wheel and mark where it meets. Measure the distance between the two marks with a ruler. This is the tire’s circumference.

### Use a tape measure

First, find the sidewall of the tire. Starting at the edge of the rim, place the end of the tape measure on the tire and extend it to the bottom of the tread. This measurement is the circumference of your tire and is also known as the “section width.”

### Find the sidewall

To find the sidewall of the 315 70r17, look for a small raised area on the tire. This is where the tread meets the sidewall. The sidewall is the part of the tire that helps support the weight of the vehicle and provides protection against punctures. It is also where the air pressure is measured.

The 315 in 315 70r17 stands for the width of the tire in millimeters. The 70 is the aspect ratio, which means that the sidewall is 70% as tall as it is wide. The r17 is the radial construction, which means that the tire has been designed for use on a passenger vehicle.

### Measure the distance around the tire

To get an accurate circumference measurement, it is best to measure the distance around the tire in millimeters. This can be done with a tape measure, or by rolling the tire until it makes one complete revolution and marking the spot where it meets back up with the starting point. Once you have the distance in millimeters, divide that number by 25.4 to convert to inches. This is the diameter of your tire.