305/70R18 in inches

Tire size specifications, like 305/70R18, provide vital information about a tire’s dimensions and capabilities. The tire size 305/70R18 is equivalent to 34.8×12.0R18 in inches.



Overall Diameter

The 305/70R18 tire size is characterized by an overall diameter of 34.8 inches, measured from one edge to the other. This measurement reflects the tire’s complete height when filled to the recommended pressure.

Tread Width

The 305/70R18 tire has a tread or section width of 12 inches. This dimension represents the distance between one sidewall to the other, signifying the contact area with the road surface.

Tire Circumference

The 305/70R18 tire has a circumference of 109.4 inches, representing the linear distance traveled in a single revolution. This measurement is crucial for determining speed, distance, and revolutions per minute (RPM).

Sidewall Height

The 305/70R18 tires feature a sidewall height of 8.4 inches. This measurement represents the vertical distance from the outer edge of the rim to the outer edge of the tire’s tread.

It plays a crucial role in defining the tire’s profile, impacting both ride comfort and handling attributes.

Revolutions Per Mile

The 305/70R18 tire size completes around 579.4 revolutions per mile. This metric signifies the full rotations the tire makes while covering one mile.

It’s important to grasp this value, as it plays a significant role in odometer readings, speed calculations, and aspects of fuel efficiency.

Wheel Size

The appropriate rim size for 305/70R18 tires is 18 inches in diameter. This detail becomes crucial when contemplating wheel replacement or upgrade, as it guarantees proper fitting of the tire onto the rim.

Construction Type

Finally, the 305/70R18 tires utilize a radial construction. In radial tire design, the internal layers or “plies” are oriented perpendicular to the direction of travel.

This configuration enhances heat dissipation and elevates overall performance, surpassing alternative construction methods.

What Does 305/70R18 Mean?

The term “305/70R18” refers to the size and specifications of a tire. Here’s a breakdown of what each part of the designation means:

  • 305: This number represents the width of the tire in millimeters. In this case, the tire is 305 millimeters wide from sidewall to sidewall.
  • 70: This number indicates the aspect ratio, which is the ratio of the tire’s sidewall height to its width. In this example, the aspect ratio is 70, meaning the sidewall height is 70% of the tire’s width.
  • R: This letter stands for “radial,” which is the most common type of tire construction. Radial tires have ply cords that run perpendicular to the direction of travel.
  • 18: This number represents the diameter of the wheel, in inches, on which the tire is designed to fit.

So, in summary, a tire with the designation 305/70R18 is a radial tire that is 305 millimeters wide, with a sidewall height that is 70% of the width, and it is designed to fit a 18-inch wheel.

What Is 305/70R18 In Inches?

The tire size 305/70R18 can be expressed in inches as approximately 12 inches wide, 8.4 inches tall in sidewall, and designed to fit a 18-inch wheel rim. The 305/70R18 also has a circumference of 109.4 inches and It completes 579.4 revolutions per mile.

305/70R18 Equivalent

The tire size 305/70R18 is equivalent with a size of 34.8x12R18 in inches. This correlation is pivotal for precision in tire selection and optimal vehicle performance.

How Tall Is A 305/70R18 Tire?

The height of a 305/70R18 tire, expressed through its diameter, is approximately 34.8 inches (884.2 mm). In short, A 305/70R18 tire size is 34.8 inches (884.2 mm) tall.

The height of the tire is subject to slight variations, determined by both the brand and model of the tire, in addition to the amount of air pressure it holds.

How Wide Is A 305/70R18 Tire?

The width of a 305/70R18 tire is 12 inches (305 millimeters). The first number in the tire size (305) represents the tire’s nominal width in millimeters from sidewall to sidewall when mounted on a specified width wheel. Therefore, the 305/70R18 tire size is 12 inches (305 mm) wide.

What Size Rim For 305/70R18?

The size of the rim for a 305/70R18 tire is 18 inches in wheel diameter. In the tire size 305/70R18, the number “18” at the end indicates the diameter of the wheel (rim) in inches that the tire is designed to fit.

Replacement Tire Size

Replacement tires have to be within 3% of the diameter of the original tires to maintain the accuracy of speedometer readings and for the proper fit and performance.

Tire Size

Overall DiameterDifference

Our Observation
The 305/70r18 tire size presents a well-rounded blend of performance and durability. Its tread width of 12 inches provides a wide contact patch with the road, enhancing traction and stability.

The sidewall height of 8.4 inches offers impressive shock absorption and ride comfort, while its overall diameter of 34.8 inches contributes to increased ground clearance and off-road prowess. The radial construction ensures longevity and fuel efficiency.

However, potential buyers should be aware that the larger overall diameter may require adjustments to the vehicle’s speedometer and odometer readings due to the lower number of revolutions per mile. The 305/70r18 is a reliable choice for individuals seeking a tire with versatile performance capabilities and robust construction.

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