115/70R15 in Inches

Understanding the dimensions of the 115/70R15 tire size in both metric and imperial units of measurement is an essential part of tire maintenance and replacement. Let us take a closer look at every important aspect of the 115/70R15 tire size to understand what these numbers represent and how they may affect your vehicle's performance.

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What is 115/70R15 in inches?

When we convert 115/70R15 to inches, it is equivalent to 21.3x4.5R15 tire size in the high flotation system.

115/70R15 Section Width
115/70R15 Tire Side
Tire Circumference
947 Revs/Mile
Metric Inches
Tire Diameter 542 mm 21.3"
Tread Width 115 mm 4.5"
Rim Diameter 381 mm 15"
Sidewall Height 80.5 mm 3.2"
Circumference 1702 mm 66.9"
Revolutions 588 per km 947 per mile

How wide is a 115/70R15 tire?

Tire width, also known as section width, is a measurement in millimeters that indicates the width of a tire from one sidewall to the other. It is the first number provided in a tire's size specifications. 115/70R15 tire has a width of 4.5 inches or 115 mm.

A greater tire width can increase the tire's contact patch with the road, potentially improving grip and handling. However, wider tires can also increase rolling resistance, which could negatively impact fuel efficiency.

Tire Width
Tread width: 4.5"

How tall is a 115/70R15 tire?

Tire height, also known as the tire's diameter or overall diameter, is the measurement from the ground to the top of the tire. It's essentially the distance from one side of the tire to the other, passing through the center, when it's correctly inflated and not under load. 115/70R15 tire has a diameter or height of 21.3 inches or 542 mm.

Tire Diameter
Tire height: 21.3"

115/70R15 Tire Sidewall Height

Tire sidewall height, also known as the tire's aspect ratio, is the measurement of the height of the tire's cross-section or the height of the tire from the rim to the tread. It is typically represented as a percentage of the tire's width. 115/70R15 tire has a sidewall height of 3.2 inches or 80.5 mm.

Sidewall height (also known as tire profile) can greatly affect a tire's driving characteristics. Lower profile tires (30 or 35 series) often provide better handling but can give a harsher ride, while higher profile tires (65 or 70 series) generally provide a smoother ride but with less precise handling.

Tire Sidewall Height
Sidewall height: 3.2"

What size rim fits a 115/70R15 tire?

The rim diameter refers to the diameter of the wheel on which a tire is mounted. It is the distance from one edge of the rim to the opposite edge, passing through the center of the wheel. 115/70R15 tire can be mounted on 15 inch wheels.

The rim diameter is crucial not only for fitting the tire properly but also plays a role in determining the overall performance of the vehicle, including its handling and ride quality.

Rim Diameter
Rim diameter: 15"

115/70R15 Tire Circumference

Tire circumference refers to the distance around the outer edge of a tire. It is the measurement of the entire circumference or perimeter of the tire when it is inflated and mounted on a wheel. 115/70R15 tire has a circumference of 66.9 inches or 1702 mm.

Tire Circumference
Tire circumference: 66.9"

How many revolutions does a 115/70R15 tire make?

Tire revolutions refer to the number of complete rotations a tire makes while the vehicle is in motion. It is a measure of the distance covered by the tire. 115/70R15 tire completes 947 revolutions per mile or 588 revolutions per kilometer.

Tire revolutions are often used in various calculations related to vehicle dynamics, such as determining the distance traveled, estimating fuel consumption, or calculating the speed of the vehicle based on the rotation of the tires. Tire revolutions can also be tracked or monitored by certain vehicle systems, such as the anti-lock braking system (ABS) or the vehicle's onboard computer, for various purposes.

Tire Revolutions
Tire revolutions: 947 per mile

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