305/40R22 in Inches

A 305/40R22 tire has a 31.6-inch diameter, a 12-inch width, and is designed for a 22-inch rim.

In high flotation terms, this tire is labeled as 31.6x12R22.

305/40R22 Tire Size
305/40R22 Tire Size in Inches
305/40R22 Tire Circumference
638.1 revs/mile

305/40R22 Tire Overview

31.6 inches
Wheel Diameter
22 inches
Tire Width
12 inches
99.3 inches
Sidewall Height
4.8 inches
638.1 per mile

What does 305/40R22 mean?

305/40R22 tire size meaning in inches

305/40R22 is a tire size with the following dimensions:

  • 305 is the width of the tire in millimeters. This number also indicates the appropriate width of the rim on which the tire should be mounted.
  • 40 is the aspect ratio, which is the ratio of the tire's height to its width. This affects the tire's handling and ride comfort
  • R indicates the tire's construction type, meaning it has a radial construction. This provides stability and precision to the tire.
  • 22 is the diameter of the wheel in inches, on which the tire is to be mounted.

305/40R22 Tire Conversion

Tire Diameter31.6 in802.8 mm
Section Width12 in305 mm
Rim Height22 in558 mm
Sidewall Height4.8 in122 mm
Circumference99.3 in2522.1 mm
Revolutions638.1 revs/mile
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FAQ About 305/40R22 Tire

How tall is a 305/40R22 tire?

The height (or diameter) of a 305/40R22 tire is 31.6 inches

How wide is a 305/40R22 tire?

The width of a 305/40R22 tire is 305 mm, which is about 12 inches.

What size rim fits a 305/40R22 tire?

A 305/40R22 tire fits on a rim that is 22 inches in diameter.

What does the 40 in a 305/40R22 tire mean?

The 40 in a 305/40R22 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 40% of its width.

Alternative Tire Sizes for 305/40R22

Typically, it's recommended to choose a tire with a diameter (height) within 3% of the original equipment manufacturer (OEM) tire size.

However, keep in mind that this is a general guideline and not an absolute rule.

Here are some tire sizes that are compatible with the 305/40R22:

Tire SizeDiameterRim
255/45R2231.0″ (-1.9%)22 x 8.0-9.5
265/45R2231.4″ (-0.6%)22 x 8.5-10.0
265/50R2232.4″ (2.5%)22 x 7.5-9.5
275/40R2230.7″ (-2.8%)22 x 9.0-11.0
275/45R2231.7″ (0.3%)22 x 8.5-10.5
285/40R2231.0″ (-1.9%)22 x 9.5-11.0
285/45R2232.1″ (1.6%)22 x 9.0-10.5
295/40R2231.3″ (-0.9%)22 x 10.0-11.5
295/45R2232.5″ (2.8%)22 x 9.5-11.0
315/35R2230.7″ (-2.8%)22 x 10.5-12.5
325/35R2231.0″ (-1.9%)22 x 11.0-13.0
325/40R2232.2″ (1.9%)22 x 11.0-13.0