285/70R18 in Inches

A 285/70R18 tire has a 33.7-inch diameter, a 11.2-inch width, and is designed for a 18-inch rim.

In high flotation terms, this tire is labeled as 33.7x11.2R18.

285/70R18 Tire Size
285/70R18 Tire Size in Inches
285/70R18 Tire Circumference
598.3 revs/mile

285/70R18 Tire Overview

33.7 inches
Wheel Diameter
18 inches
Tire Width
11.2 inches
105.9 inches
Sidewall Height
7.9 inches
598.3 per mile

What does 285/70R18 mean?

285/70R18 tire size meaning in inches

285/70R18 is a tire size with the following dimensions:

  • 285 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.

285/70R18 Tire Conversion

Tire Diameter33.7 in856.2 mm
Section Width11.2 in285 mm
Rim Height18 in457 mm
Sidewall Height7.9 in199.5 mm
Circumference105.9 in2689.8 mm
Revolutions598.3 revs/mile
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FAQ About 285/70R18 Tire

How tall is a 285/70R18 tire?

The height (or diameter) of a 285/70R18 tire is 33.7 inches

How wide is a 285/70R18 tire?

The width of a 285/70R18 tire is 285 mm, which is about 11.2 inches.

What size rim fits a 285/70R18 tire?

A 285/70R18 tire fits on a rim that is 18 inches in diameter.

What does the 70 in a 285/70R18 tire mean?

The 70 in a 285/70R18 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 70% of its width.

Alternative Tire Sizes for 285/70R18

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 285/70R18:

Tire SizeDiameterRim
275/70R1833.2″ (-1.5%)18 x 7.0-8.5
295/65R1833.1″ (-1.8%)18 x 8.0-10.0
295/70R1834.3″ (1.8%)18 x 7.0-10.0
305/65R1833.6″ (-0.3%)18 x 8.5-11.0
325/60R1833.4″ (-0.9%)18 x 8.5-10.0
325/65R1834.6″ (2.7%)18 x 9.0-10.0
345/60R1834.3″ (1.8%)18 x n/a
375/50R1832.8″ (-2.7%)18 x n/a