155/80R18 in Inches

A 155/80R18 tire has a 27.8-inch diameter, a 6.1-inch width, and is designed for a 18-inch rim.

In high flotation terms, this tire is labeled as 27.8x6.1R18.

155/80R18 Tire Size
6.1"
27.8"
155/80R18 Tire Size in Inches
155/80R18 Tire Circumference
87.2"
18"
4.9"
726.4 revs/mile

155/80R18 Tire Overview

Height
27.8 inches
Wheel Diameter
18 inches
Tire Width
6.1 inches
Circumference
87.2 inches
Sidewall Height
4.9 inches
Revolutions
726.4 per mile
Tirelib.com

What does 155/80R18 mean?

155/80R18 tire size meaning in inches

155/80R18 is a tire size with the following dimensions:

  • 155 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.

155/80R18 Tire Conversion

DimensionsInchesMillimeters
Tire Diameter27.8 in705.2 mm
Section Width6.1 in155 mm
Rim Height18 in457 mm
Sidewall Height4.9 in124 mm
Circumference87.2 in2215.5 mm
Revolutions726.4 revs/mile
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FAQ About 155/80R18 Tire

How tall is a 155/80R18 tire?

The height (or diameter) of a 155/80R18 tire is 27.8 inches

How wide is a 155/80R18 tire?

The width of a 155/80R18 tire is 155 mm, which is about 6.1 inches.

What size rim fits a 155/80R18 tire?

A 155/80R18 tire fits on a rim that is 18 inches in diameter.

What does the 80 in a 155/80R18 tire mean?

The 80 in a 155/80R18 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 80% of its width.

Alternative Tire Sizes for 155/80R18

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 155/80R18:

Tire SizeDiameterRim
145/80R1827.1″ (-2.5%)18 x n/a
145/85R1827.7″ (-0.4%)18 x n/a
155/85R1828.4″ (2.2%)18 x n/a
165/70R1827.1″ (-2.5%)18 x n/a
205/60R1827.7″ (-0.4%)18 x 5.0-7.5
215/55R1827.3″ (-1.8%)18 x 6.0-7.5
225/55R1827.7″ (-0.4%)18 x 6.0-8.0
225/60R1828.6″ (2.9%)18 x 6.0-8.0
235/50R1827.3″ (-1.8%)18 x 6.5-8.5
235/55R1828.2″ (1.4%)18 x 6.5-8.5
245/50R1827.6″ (-0.7%)18 x 7.0-8.5
245/55R1828.6″ (2.9%)18 x 7.0-8.5
255/45R1827.0″ (-2.9%)18 x 8.0-9.5
255/50R1828.0″ (0.7%)18 x 7.0-9.0
265/45R1827.4″ (-1.4%)18 x 8.5-10.0
265/50R1828.4″ (2.2%)18 x 7.5-9.5
275/45R1827.7″ (-0.4%)18 x 8.5-10.5
285/40R1827.0″ (-2.9%)18 x 9.5-11.0
285/45R1828.1″ (1.1%)18 x 9.0-10.5
295/40R1827.3″ (-1.8%)18 x 10.0-11.5
295/45R1828.5″ (2.5%)18 x 9.5-11.0
305/40R1827.6″ (-0.7%)18 x 10.0-12.0
315/40R1827.9″ (0.4%)18 x 10.5-12.5
325/35R1827.0″ (-2.9%)18 x 11.0-13.0
335/35R1827.2″ (-2.2%)18 x n/a
345/35R1827.5″ (-1.1%)18 x 11.5-13.5