155/70R18 in Inches

A 155/70R18 tire has a 26.5-inch diameter, a 6.1-inch width, and is designed for a 18-inch rim.

In high flotation terms, this tire is labeled as 26.5x6.1R18.

155/70R18 Tire Size
6.1"
26.5"
155/70R18 Tire Size in Inches
155/70R18 Tire Circumference
83.4"
18"
4.3"
759.8 revs/mile

155/70R18 Tire Overview

Height
26.5 inches
Wheel Diameter
18 inches
Tire Width
6.1 inches
Circumference
83.4 inches
Sidewall Height
4.3 inches
Revolutions
759.8 per mile
Tirelib.com

What does 155/70R18 mean?

155/70R18 tire size meaning in inches

155/70R18 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.
  • 70 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.

155/70R18 Tire Conversion

DimensionsInchesMillimeters
Tire Diameter26.5 in674.2 mm
Section Width6.1 in155 mm
Rim Height18 in457 mm
Sidewall Height4.3 in108.5 mm
Circumference83.4 in2118.1 mm
Revolutions759.8 revs/mile
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FAQ About 155/70R18 Tire

How tall is a 155/70R18 tire?

The height (or diameter) of a 155/70R18 tire is 26.5 inches

How wide is a 155/70R18 tire?

The width of a 155/70R18 tire is 155 mm, which is about 6.1 inches.

What size rim fits a 155/70R18 tire?

A 155/70R18 tire fits on a rim that is 18 inches in diameter.

What does the 70 in a 155/70R18 tire mean?

The 70 in a 155/70R18 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 70% of its width.

Alternative Tire Sizes for 155/70R18

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 155/70R18:

Tire SizeDiameterRim
135/80R1826.5″ (Equal)18 x n/a
215/50R1826.5″ (Equal)18 x 6.0-7.5
145/70R1826.0″ (-1.9%)18 x n/a
145/80R1827.1″ (2.3%)18 x n/a
165/70R1827.1″ (2.3%)18 x n/a
185/55R1826.0″ (-1.9%)18 x n/a
205/50R1826.1″ (-1.5%)18 x n/a
205/55R1826.9″ (1.5%)18 x 5.5-7.5
225/45R1826.0″ (-1.9%)18 x 7.0-8.5
225/50R1826.9″ (1.5%)18 x 6.0-8.0
235/45R1826.3″ (-0.8%)18 x 7.5-9.0
245/45R1826.7″ (0.8%)18 x 7.5-9.0
255/40R1826.0″ (-1.9%)18 x 8.5-10.0
255/45R1827.0″ (1.9%)18 x 8.0-9.5
265/40R1826.3″ (-0.8%)18 x 9.0-10.5
275/40R1826.7″ (0.8%)18 x 9.0-11.0
285/35R1825.9″ (-2.3%)18 x 9.5-11.0
285/40R1827.0″ (1.9%)18 x 9.5-11.0
295/35R1826.1″ (-1.5%)18 x 10.0-11.5
305/35R1826.4″ (-0.4%)18 x 10.0-12.0
315/35R1826.7″ (0.8%)18 x 10.5-12.5
325/35R1827.0″ (1.9%)18 x 11.0-13.0
335/30R1825.9″ (-2.3%)18 x 11.5-12.5
335/35R1827.2″ (2.6%)18 x n/a
345/30R1826.1″ (-1.5%)18 x 12.0-14.0