Tire Size 225/45r13 in inches

The tire size 225/45R13, which is equivalent to an overall diameter of 21 inches and a section width of 8.9 inches, is designed to fit a 13-inch diameter wheel. This tire is approved to be mounted on rim widths ranging from 7.0 to 8.5 inches. In this article, we will delve into the dimensions of the 225/45R13 tire in both inches and millimeters, as well as discuss its relevant specifications.

225/45r13 in inches

Feature Inches Millimeters
Tire Diameter 21 532.7
Section Width 8.9 225
Rim Height 13 330
Sidewall Height 4 101.3
Circumference 65.9 1673.5
Revolutions 599/km 966/mile

How Tall Is a 225/45R13 Tire?

The tire height of the 225/45R13 tire size is 21 inches or approximately 532.7 millimeters. This measurement is obtained by adding the sidewall height (in millimeters) twice to the rim diameter (in millimeters). The overall diameter of the tire affects the speedometer accuracy, suspension setup, and overall vehicle performance.

What Is the 225/45R13 Width in Inches?

The tread width of the 225/45R13 tire size is 8.9 inches or approximately 225 millimeters. This measurement refers to the distance between the outer edges of the tire’s tread, providing an indication of the tire’s contact patch with the road surface. The width of the tire affects its grip, stability, and handling characteristics.

What Is the 225/45R13 Sidewall Height?

The sidewall height of the 225/45R13 tire size is 4 inches or approximately 101.3 millimeters. The sidewall height is calculated by multiplying the aspect ratio (45%) by the section width (225 millimeters). The sidewall height plays a crucial role in the tire’s overall profile, affecting ride comfort, impact absorption, and sidewall stiffness.

What Is the 225/45R13 Tire Circumference?

The circumference of the 225/45R13 tire size is 65.9 inches or approximately 1,673.5 millimeters. The tire’s circumference represents the distance it covers in one revolution. It is calculated by multiplying the tire’s diameter by pi (π). The tire circumference directly affects the accuracy of the speedometer and odometer readings.

What Is the 225/45R13 Revolutions Per Mile?

For the 225/45R13 tire size, there are approximately 599 revolutions per kilometer or 966 revolutions per mile. The revolutions per mile value is useful for determining the tire’s rotational speed, as well as for analyzing fuel consumption, odometer readings, and other vehicle-related calculations.

What Is the 225/45R13 Rim Size?

For the 225/45R13 tire size, the rim diameter is 13 inches or approximately 330 millimeters. The rim size must match the tire size to ensure proper fitment and compatibility. Using rims outside the approved range can negatively affect tire performance, handling, and safety.

Replacement Tire Size
When replacing tires, it is important to select sizes within 3% of the original tire diameter. This ensures that the overall diameter and circumference remain relatively unchanged, preserving the accuracy of the speedometer and maintaining the vehicle’s performance characteristics.

Tire Size Overall Diameter Difference
145/65R13 20.4″ (518 mm) -2.6%
135/70R13 20.5″ (520 mm) -2.3%
175/55R13 20.6″ (522 mm) -1.9%
165/60R13 20.8″ (528 mm) -0.8%
125/80R13 20.9″ (530 mm) -0.4%
155/65R13 20.9″ (532 mm) 0%
145/70R13 21″ (534 mm) 0.4%
185/55R13 21″ (534 mm) 0.4%
255/40R13 21″ (534 mm) 0.4%
205/50R13 21.1″ (536 mm) 0.8%
175/60R13 21.3″ (540 mm) 1.5%
165/65R13 21.4″ (544 mm) 2.3%
195/55R13 21.4″ (544 mm) 2.3%
215/50R13 21.5″ (546 mm) 2.6%
135/80R13 21.5″ (546 mm) 2.6%

Our Observation
The 225/45R13 tire size offers a balanced combination of width, sidewall height, and overall diameter. Its 8.9-inch tread width provides good road contact, while the 4-inch sidewall height contributes to a comfortable ride. With an overall diameter of 21 inches, this tire size suits vehicles with compatible 13-inch rims, offering a reliable and appropriate fitment option.

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