Tire Size 305/40r18 in inches

The tire size 305/40R18 is equivalent to 27.6x12R18 in inches, has a diameter of 27.6 inches (701.2 mm), a section width of 12 inches (305 mm), a wheel diameter of 18 inches (457 mm), and is approved to be mounted on 10.0-12.0 inches (254-304.8 mm) wide wheels.

This versatile tire size offers a blend of functionality, performance, and aesthetics, making it a popular choice for many vehicles.

305/40r18 in inches

With this Table chart, you can effortlessly comprehend detailed measurements in inches and millimeters concurrently.

Tire Diameter27.6701.2
Section Width12305
Rim Height18457
Sidewall Height4.8122
Revolutions454 per km731 per mile
Rim Width Range10.0-12.0254 – 304.8

How Tall Is A 305/40R18 Tire?

The tire height of the 305/40R18 tire size is approximately 27.6 inches or 701.2 millimeters. This measurement is derived from the tire’s overall diameter. Tire height can sometimes vary slightly depending on the tire’s specific brand or model due to unique design characteristics.

What Is the 305/40R18 Width In Inches?

The tread width of the 305/40R18 tire size is about 12 inches or 305 millimeters. This measurement refers to the tire’s width from one sidewall to the other. A wider tire generally allows for better traction and stability, especially at high speeds.

What Is the 305/40R18 Sidewall Height?

The 305/40R18 tire’s sidewall height is around 4.8 inches or 122 millimeters. This is calculated by taking 40% (aspect ratio) of the tread width (305mm). The sidewall height is critical as it affects the ride comfort and the vehicle’s handling capabilities.

What Is the 305/40R18 Tire Circumference?

The circumference of the 305/40R18 tire size is 86.7 inches or 2202.9 millimeters. This measurement is the distance around the tire. The circumference impacts various factors, including the revolutions per mile and the tire’s rolling resistance.

What Is the 305/40R18 Revolutions Per Mile?

For the 305/40R18 tire size, there are approximately 731 revolutions per mile or 454 revolutions per kilometer. This metric is important to know as it affects the vehicle’s speedometer and odometer accuracy.

What Is the 305/40R18 Rims Size?

The 305/40R18 tire size, the rim diameter is 18 inches or 457 millimeters. This tire can be mounted on rims with widths between 10.0 to 12.0 inches or 254 to 304.8 millimeters, ensuring optimal performance and safety.

Replacement Tire Size
Replacement tires have to be within 3% of the diameter of the original tires to maintain the accuracy of the vehicle’s speedometer and odometer.

Tire SizeOverall DiameterDifference

Our Observation
In conclusion, the 305/40R18 tire size presents a valuable balance of performance and aesthetic appeal. Its 12-inch width provides excellent stability and grip, while its 18-inch rim diameter allows for a broad range of compatible vehicles.

With a sidewall height of 4.8 inches, it offers a comfortable ride without compromising the sporty look many drivers prefer.

However, it’s important to remember that this is a general observation and may vary depending on the specific tire brand, model, driving conditions, and vehicle specifications. Always consult with a tire professional before selecting tires for your vehicle.

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