175/80R18 in Inches

A 175/80R18 tire has a 29-inch diameter, a 6.9-inch width, and is designed for a 18-inch rim.

In high flotation terms, this tire is labeled as 29x6.9R18.

175/80R18 Tire Size
175/80R18 Tire Size in Inches
175/80R18 Tire Circumference
694.9 revs/mile

175/80R18 Tire Overview

29 inches
Wheel Diameter
18 inches
Tire Width
6.9 inches
91.2 inches
Sidewall Height
5.5 inches
694.9 per mile

What does 175/80R18 mean?

175/80R18 tire size meaning in inches

175/80R18 is a tire size with the following dimensions:

  • 175 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.
  • 80 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.

175/80R18 Tire Conversion

Tire Diameter29 in737.2 mm
Section Width6.9 in175 mm
Rim Height18 in457 mm
Sidewall Height5.5 in140 mm
Circumference91.2 in2316 mm
Revolutions694.9 revs/mile
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FAQ About 175/80R18 Tire

How tall is a 175/80R18 tire?

The height (or diameter) of a 175/80R18 tire is 29 inches

How wide is a 175/80R18 tire?

The width of a 175/80R18 tire is 175 mm, which is about 6.9 inches.

What size rim fits a 175/80R18 tire?

A 175/80R18 tire fits on a rim that is 18 inches in diameter.

What does the 80 in a 175/80R18 tire mean?

The 80 in a 175/80R18 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 80% of its width.

Alternative Tire Sizes for 175/80R18

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 175/80R18:

Tire SizeDiameterRim
155/90R1829.0″ (Equal)18 x n/a
255/55R1829.0″ (Equal)18 x 7.0-9.0
155/85R1828.4″ (-2.1%)18 x n/a
165/90R1829.7″ (2.4%)18 x n/a
225/60R1828.6″ (-1.4%)18 x 6.0-8.0
225/65R1829.5″ (1.7%)18 x 6.0-8.0
235/55R1828.2″ (-2.8%)18 x 6.5-8.5
235/60R1829.1″ (0.3%)18 x 6.5-8.5
245/55R1828.6″ (-1.4%)18 x 7.0-8.5
245/60R1829.6″ (2.1%)18 x 7.0-8.5
265/50R1828.4″ (-2.1%)18 x 7.5-9.5
265/55R1829.5″ (1.7%)18 x 7.5-9.5
275/50R1828.8″ (-0.7%)18 x 7.5-9.5
285/50R1829.2″ (0.7%)18 x 8.0-10.0
295/45R1828.5″ (-1.7%)18 x 9.5-11.0
305/45R1828.8″ (-0.7%)18 x 9.5-11.5
325/45R1829.5″ (1.7%)18 x n/a