285/55R20 in Inches

Understanding the dimensions of the 285/55R20 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 285/55R20 tire size to understand what these numbers represent and how they may affect your vehicle's performance.

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What is 285/55R20 in inches?

When we convert 285/55R20 to inches, it is equivalent to 32.3x11.2R20 tire size in the high flotation system.

285/55R20 Section Width
285/55R20 Tire Side
Tire Circumference
625 Revs/Mile
Metric Inches
Tire Diameter 821.6 mm 32.3"
Tread Width 285 mm 11.2"
Rim Diameter 508 mm 20"
Sidewall Height 156.8 mm 6.2"
Circumference 2580 mm 101.4"
Revolutions 388 per km 625 per mile

How wide is a 285/55R20 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. 285/55R20 tire has a width of 11.2 inches or 285 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: 11.2"

How tall is a 285/55R20 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. 285/55R20 tire has a diameter or height of 32.3 inches or 821.6 mm.

Tire Diameter
Tire height: 32.3"

285/55R20 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. 285/55R20 tire has a sidewall height of 6.2 inches or 156.8 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: 6.2"

What size rim fits a 285/55R20 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. 285/55R20 tire can be mounted on 20 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: 20"

285/55R20 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. 285/55R20 tire has a circumference of 101.4 inches or 2580 mm.

Tire Circumference
Tire circumference: 101.4"

How many revolutions does a 285/55R20 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. 285/55R20 tire completes 625 revolutions per mile or 388 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: 625 per mile

More 20-inch Tire Conversions

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