225/45R15 In Inches – Tire Size & Wheel Fitment Guide

What size tire is 225/45R15 in Inches?

The 225/45R15 tire has an overall diameter of 23 inches, a section width of 8.9 inches, and can be mounted on 15 x 7.0-8.5 inches rim. The equivalent tire size in the high flotation system is 23x8.9R15.

	Inches	Millimeters
Tire Diameter	23	583.5
Section Width	8.9	225
Rim Height	15	381
Sidewall Height	4	101.3
Circumference	72.2	1833.1

8.9"

23"

72.2"

15"

4"

877.9 Revs/Mile

To help you understand, we'll break down each part of the 225/45R15 tire size to know what these numbers represent & how they may affect your tire's performance:

How wide is a 225/45R15 tire?

The 225/45R15 tire has a width of 8.9 inches (225 mm). This is the measurement at its thickest point, the distance between the outer sidewall and the inner sidewall’s widest point, also called as tread width or section width.

How tall is a 225/45R15 tire?

The 225/45R15 tire has a height of 23 inches (583.5 mm). This is the measurement from the bottom to the highest point at the top of a tire through its exact center when inflated and unloaded.

225/45R15 sidewall height

The 225/45R15 has a sidewall height of 4 inches (101.3 mm). It’s measured from the rim to the outer edge of the tire's tread, expressed as a percentage of tire width.

What size rim do you need for 225/45R15 tire?

You can mount the 225/45R15 tire on a rim with a height of 15 inches and a width ranging from 7.0-8.5 inches. (Based on recommendations of The Tire and Rim Association (TRA))

Putting very narrow tires on wide rims or vice versa can result in reduced performance of the tire.

225/45R15 circumference

The 225/45R15 tire has a circumference of 72.2 inches (1833.1 mm), This is the measurement of the distance the tire travels in one revolution.

The tire circumference is important for your vehicle's overall performance, affecting its speedometer acceleration, accuracy and fuel efficiency.

225/45R15 Revolutions

The 225/45R15 performs 877.9 revs/mile. Revolutions per mile indicate the number of times a tire rotates while it covers the distance of one mile.

Replacement Tire Sizes for 225/45R15

As a rule, you can replace the tire within a 3% difference in tire diameter (height) of the OEM tire size. Here is a list of compatible tire sizes for 225/45R15: