205/55R18 in Inches

A 205/55R18 tire has a 26.9-inch diameter, a 8.1-inch width, and is designed for a 18-inch rim.

In high flotation terms, this tire is labeled as 26.9x8.1R18.

205/55R18 Tire Size
8.1"
26.9"
205/55R18 Tire Size in Inches
205/55R18 Tire Circumference
84.4"
18"
4.4"
750.4 revs/mile

205/55R18 Tire Overview

Height
26.9 inches
Wheel Diameter
18 inches
Tire Width
8.1 inches
Circumference
84.4 inches
Sidewall Height
4.4 inches
Revolutions
750.4 per mile
Tirelib.com

What does 205/55R18 mean?

205/55R18 tire size meaning in inches

205/55R18 is a tire size with the following dimensions:

  • 205 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.
  • 55 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.

205/55R18 Tire Conversion

DimensionsInchesMillimeters
Tire Diameter26.9 in682.7 mm
Section Width8.1 in205 mm
Rim Height18 in457 mm
Sidewall Height4.4 in112.8 mm
Circumference84.4 in2144.8 mm
Revolutions750.4 revs/mile
Not the tire size you are searching for? Try our Tire Size Calculator.

FAQ About 205/55R18 Tire

How tall is a 205/55R18 tire?

The height (or diameter) of a 205/55R18 tire is 26.9 inches

How wide is a 205/55R18 tire?

The width of a 205/55R18 tire is 205 mm, which is about 8.1 inches.

What size rim fits a 205/55R18 tire?

A 205/55R18 tire fits on a rim that is 18 inches in diameter.

What does the 55 in a 205/55R18 tire mean?

The 55 in a 205/55R18 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 55% of its width.

Alternative Tire Sizes for 205/55R18

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 205/55R18:

Tire SizeDiameterRim
225/50R1826.9″ (Equal)18 x 6.0-8.0
135/80R1826.5″ (-1.5%)18 x n/a
145/80R1827.1″ (0.7%)18 x n/a
145/85R1827.7″ (3.0%)18 x n/a
155/70R1826.5″ (-1.5%)18 x n/a
165/70R1827.1″ (0.7%)18 x n/a
205/50R1826.1″ (-3.0%)18 x n/a
205/60R1827.7″ (3.0%)18 x 5.0-7.5
215/50R1826.5″ (-1.5%)18 x 6.0-7.5
215/55R1827.3″ (1.5%)18 x 6.0-7.5
225/55R1827.7″ (3.0%)18 x 6.0-8.0
235/45R1826.3″ (-2.2%)18 x 7.5-9.0
235/50R1827.3″ (1.5%)18 x 6.5-8.5
245/45R1826.7″ (-0.7%)18 x 7.5-9.0
245/50R1827.6″ (2.6%)18 x 7.0-8.5
255/45R1827.0″ (0.4%)18 x 8.0-9.5
265/40R1826.3″ (-2.2%)18 x 9.0-10.5
265/45R1827.4″ (1.9%)18 x 8.5-10.0
275/40R1826.7″ (-0.7%)18 x 9.0-11.0
275/45R1827.7″ (3.0%)18 x 8.5-10.5
285/40R1827.0″ (0.4%)18 x 9.5-11.0
295/35R1826.1″ (-3.0%)18 x 10.0-11.5
295/40R1827.3″ (1.5%)18 x 10.0-11.5
305/35R1826.4″ (-1.9%)18 x 10.0-12.0
305/40R1827.6″ (2.6%)18 x 10.0-12.0
315/35R1826.7″ (-0.7%)18 x 10.5-12.5
325/35R1827.0″ (0.4%)18 x 11.0-13.0
335/35R1827.2″ (1.1%)18 x n/a
345/30R1826.1″ (-3.0%)18 x 12.0-14.0
345/35R1827.5″ (2.2%)18 x 11.5-13.5