245/30R18 in Inches

A 245/30R18 tire has a 23.8-inch diameter, a 9.6-inch width, and is designed for a 18-inch rim.

In high flotation terms, this tire is labeled as 23.8x9.6R18.

245/30R18 Tire Size
245/30R18 Tire Size in Inches
245/30R18 Tire Circumference
847.8 revs/mile

245/30R18 Tire Overview

23.8 inches
Wheel Diameter
18 inches
Tire Width
9.6 inches
74.7 inches
Sidewall Height
2.9 inches
847.8 per mile

What does 245/30R18 mean?

245/30R18 tire size meaning in inches

245/30R18 is a tire size with the following dimensions:

  • 245 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.
  • 30 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.
  • 18 is the diameter of the wheel in inches, on which the tire is to be mounted.

245/30R18 Tire Conversion

Tire Diameter23.8 in604.2 mm
Section Width9.6 in245 mm
Rim Height18 in457 mm
Sidewall Height2.9 in73.5 mm
Circumference74.7 in1898.2 mm
Revolutions847.8 revs/mile
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FAQ About 245/30R18 Tire

How tall is a 245/30R18 tire?

The height (or diameter) of a 245/30R18 tire is 23.8 inches

How wide is a 245/30R18 tire?

The width of a 245/30R18 tire is 245 mm, which is about 9.6 inches.

What size rim fits a 245/30R18 tire?

A 245/30R18 tire fits on a rim that is 18 inches in diameter.

What does the 30 in a 245/30R18 tire mean?

The 30 in a 245/30R18 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 30% of its width.

Alternative Tire Sizes for 245/30R18

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 245/30R18:

Tire SizeDiameterRim
125/60R1823.9″ (0.4%)18 x n/a
135/60R1824.4″ (2.5%)18 x n/a
165/40R1823.2″ (-2.5%)18 x n/a
175/45R1824.2″ (1.7%)18 x n/a
195/35R1823.4″ (-1.7%)18 x n/a
205/35R1823.6″ (-0.8%)18 x 7.0-8.0
205/40R1824.5″ (2.9%)18 x 7.0-8.0
215/35R1823.9″ (0.4%)18 x 7.0-8.5
225/30R1823.3″ (-2.1%)18 x 8
225/35R1824.2″ (1.7%)18 x 7.5-9.0
235/30R1823.6″ (-0.8%)18 x n/a
235/35R1824.5″ (2.9%)18 x 8.0-9.5
255/30R1824.0″ (0.8%)18 x 8.5-9.5
265/30R1824.3″ (2.1%)18 x 9.0-10.0