245/75R18 in Inches

A 245/75R18 tire has a 32.5-inch diameter, a 9.6-inch width, and is designed for a 18-inch rim.

In high flotation terms, this tire is labeled as 32.5x9.6R18.

245/75R18 Tire Size
9.6"
32.5"
245/75R18 Tire Size in Inches
245/75R18 Tire Circumference
102"
18"
7.2"
621.2 revs/mile

245/75R18 Tire Overview

Height
32.5 inches
Wheel Diameter
18 inches
Tire Width
9.6 inches
Circumference
102 inches
Sidewall Height
7.2 inches
Revolutions
621.2 per mile
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What does 245/75R18 mean?

245/75R18 tire size meaning in inches

245/75R18 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.
  • 75 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.

245/75R18 Tire Conversion

DimensionsInchesMillimeters
Tire Diameter32.5 in824.7 mm
Section Width9.6 in245 mm
Rim Height18 in457 mm
Sidewall Height7.2 in183.8 mm
Circumference102 in2590.9 mm
Revolutions621.2 revs/mile
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FAQ About 245/75R18 Tire

How tall is a 245/75R18 tire?

The height (or diameter) of a 245/75R18 tire is 32.5 inches

How wide is a 245/75R18 tire?

The width of a 245/75R18 tire is 245 mm, which is about 9.6 inches.

What size rim fits a 245/75R18 tire?

A 245/75R18 tire fits on a rim that is 18 inches in diameter.

What does the 75 in a 245/75R18 tire mean?

The 75 in a 245/75R18 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 75% of its width.


Alternative Tire Sizes for 245/75R18

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 245/75R18:

Tire SizeDiameterRim
235/75R1831.9″ (-1.8%)18 x n/a
255/70R1832.1″ (-1.2%)18 x 6.5-8.5
265/65R1831.6″ (-2.8%)18 x 7.5-9.5
265/70R1832.6″ (0.3%)18 x 7.0-9.0
275/65R1832.1″ (-1.2%)18 x 7.5-9.5
275/70R1833.2″ (2.2%)18 x 7.0-8.5
285/65R1832.6″ (0.3%)18 x 8.0-10.0
295/65R1833.1″ (1.8%)18 x 8.0-10.0
305/60R1832.4″ (-0.3%)18 x 8.5-11.0
325/60R1833.4″ (2.8%)18 x 8.5-10.0
375/50R1832.8″ (0.9%)18 x n/a