Tire Size 305/45r20 in inches

The tire size 305/45R20 is equivalent to 30.8x12R20 in inches, has a diameter of 30.8 inches, a section width of 12 inches, a wheel diameter of 20 inches, and is approved to be mounted on 9.5 to 11.5 inches wide wheels. This presents an amalgamation of design, performance, and durability for various vehicle types that it fits.

305/45r20 in inches

This Table chart facilitates a comprehensive comprehension of measurements in inches and millimeters at once.

Feature Inches Metric
Tire Diameter 30.8 782.5
Section Width 12 305
Rim Height 20 508
Sidewall Height 5.4 137.3
Circumference 96.8 2458.3
Revolutions 407 per km 655 per mile
Rim Width Range 9.5-11.5 241.3 – 292.1

How Tall Is A 305/45R20 Tire?

The Tire Height of the 305/45R20 tire size is approximately 30.8 inches or 782.5 millimeters. This measurement is taken from the base to the top of the tire when it is properly inflated, and it includes the rim’s diameter. Its relatively large height can offer excellent ground clearance, making it suitable for various road conditions.

What Is the 305/45R20 Width In Inches?

The tread width of the 305/45R20 tire size is around 12 inches, equivalent to 305 millimeters. The tread width refers to measuring the tire’s widest point, providing a large contact patch with the road surface. This wide footprint is crucial in providing excellent stability, improved handling, and good traction.

What Is the 305/45R20 Sidewall Height?

The 305/45R20 tire’s sidewall height is about 5.4 inches or 137.3 millimeters. The sidewall height, also referred to as the tire’s aspect ratio, is the distance between the rim seat and the outer tread. This measurement is vital for ride comfort, as taller sidewalls can absorb road bumps better than shorter ones.

What Is the 305/45R20 Tire Circumference?

The circumference of the 305/45R20 tire size is around 96.8 inches or 2458.3 millimeters. This measurement is the total distance around the tire’s outer tread. An important figure impacts a tire’s revolutions per mile, with a larger circumference resulting in fewer revolutions per mile.

What Is the 305/45R20 Revolutions Per Mile?

For the 305/45R20 tire size, there are approximately 655 revolutions per mile or 407 revolutions per kilometer. This measurement indicates how many times a tire will rotate over the distance of a mile. It is critical for accurate speedometer readings and optimal vehicle performance.

What Is the 305/45R20 Rims Size?

The 305/45R20 tire size, the rim diameter is 20 inches or 508 millimeters. The tire can be mounted on rims with widths ranging between 9.5 to 11.5 inches, equivalent to 241.3 to 292.1 millimeters. The proper rim size is essential to ensure the tire fits securely and performs optimally.

Fitment Guide
This table will guide you on which vehicles are compatible with the 305/45R20 tire size. It’s crucial to ensure proper fitment to maintain the vehicle’s performance and safety.

Brand Name Model
DODGE Ram 2500 (1994 – 2002)
LEXUS GX (2014 – 2023)

Replacement Tire Size
Replacement tires have to be within 3% of the diameter of the original tires to maintain the proper functioning of the vehicle systems. The 305/45R20 is a popular choice due to its balance of width, height, and performance attributes.

Tire Size Overall Diameter Difference
285/45R20 30.1″ (764 mm) -2.3%
255/50R20 30.1″ (764 mm) -2.3%
235/55R20 30.2″ (766 mm) -2.0%
295/45R20 30.5″ (774 mm) -1.0%
265/50R20 30.5″ (774 mm) -1.0%
275/50R20 30.9″ (784 mm) 0.3%
255/55R20 31.0″ (788 mm) 0.8%
285/50R20 31.3″ (794 mm) 1.5%
245/60R20 31.6″ (802 mm) 2.6%
295/50R20 31.7″ (804 mm) 2.8%

Our Observation
The 305/45R20 tire size offers a perfect blend of functionality and aesthetics for many vehicle owners. Its wider tread width and taller sidewall height provide an impressive road grip and enhanced ride comfort, while the large diameter contributes to the vehicle’s overall aggressive look. This tire size is excellent for vehicle owners who desire optimal performance without compromising ride comfort and stability.

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