285/55R20 in Inches

A 285/55R20 tire has a 32.3-inch diameter, a 11.2-inch width, and is designed for a 20-inch rim.

In high flotation terms, this tire is labeled as 32.3x11.2R20.

285/55R20 Tire Size
285/55R20 Tire Size in Inches
285/55R20 Tire Circumference
623.6 revs/mile

285/55R20 Tire Overview

32.3 inches
Wheel Diameter
20 inches
Tire Width
11.2 inches
101.6 inches
Sidewall Height
6.2 inches
623.6 per mile

What does 285/55R20 mean?

285/55R20 tire size meaning in inches

285/55R20 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.
  • 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.
  • 20 is the diameter of the wheel in inches, on which the tire is to be mounted.

285/55R20 Tire Conversion

Tire Diameter32.3 in821.5 mm
Section Width11.2 in285 mm
Rim Height20 in508 mm
Sidewall Height6.2 in156.8 mm
Circumference101.6 in2580.8 mm
Revolutions623.6 revs/mile
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FAQ About 285/55R20 Tire

How tall is a 285/55R20 tire?

The height (or diameter) of a 285/55R20 tire is 32.3 inches

How wide is a 285/55R20 tire?

The width of a 285/55R20 tire is 285 mm, which is about 11.2 inches.

What size rim fits a 285/55R20 tire?

A 285/55R20 tire fits on a rim that is 20 inches in diameter.

What does the 55 in a 285/55R20 tire mean?

The 55 in a 285/55R20 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 55% of its width.

Alternative Tire Sizes for 285/55R20

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 285/55R20:

Tire SizeDiameterRim
245/60R2031.6″ (-2.2%)20 x 7.0-8.5
255/60R2032.0″ (-0.9%)20 x 7.0-9.0
265/55R2031.5″ (-2.5%)20 x n/a
265/60R2032.5″ (0.6%)20 x 7.5-9.5
275/55R2031.9″ (-1.2%)20 x 7.5-9.5
275/60R2033.0″ (2.2%)20 x 7.5-9.5
295/50R2031.6″ (-2.2%)20 x 8.0-10.5
295/55R2032.8″ (1.5%)20 x 8.0-10.0
305/50R2032.0″ (-0.9%)20 x 8.5-11.0
305/55R2033.2″ (2.8%)20 x 8.5-10.0
315/50R2032.4″ (0.3%)20 x 8.5-11.0
325/50R2032.8″ (1.5%)20 x 9.0-11.5