P345/30R18 in Inches

Understanding the dimensions of the P345/30R18 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 P345/30R18 tire size to understand what these numbers represent and how they may affect your vehicle's performance.

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What is P345/30R18 in inches?

When we convert P345/30R18 to inches, it is equivalent to 26.1x13.6R18 tire size in the high flotation system.

P345/30R18 Section Width
P345/30R18 Tire Side
Tire Circumference
773 Revs/Mile
Metric Inches
Tire Diameter 664.2 mm 26.1"
Tread Width 345 mm 13.6"
Rim Diameter 457 mm 18"
Sidewall Height 103.5 mm 4.1"
Circumference 2086 mm 82"
Revolutions 479 per km 773 per mile

How wide is a P345/30R18 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. P345/30R18 tire has a width of 13.6 inches or 345 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: 13.6"

How tall is a P345/30R18 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. P345/30R18 tire has a diameter or height of 26.1 inches or 664.2 mm.

Tire Diameter
Tire height: 26.1"

P345/30R18 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. P345/30R18 tire has a sidewall height of 4.1 inches or 103.5 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: 4.1"

What size rim fits a P345/30R18 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. P345/30R18 tire can be mounted on 18 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: 18"

P345/30R18 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. P345/30R18 tire has a circumference of 82 inches or 2086 mm.

Tire Circumference
Tire circumference: 82"

How many revolutions does a P345/30R18 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. P345/30R18 tire completes 773 revolutions per mile or 479 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: 773 per mile

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