145/80R20 in Inches

A 145/80R20 tire has a 29.1-inch diameter, a 5.7-inch width, and is designed for a 20-inch rim.

In high flotation terms, this tire is labeled as 29.1x5.7R20.

145/80R20 Tire Size
5.7"
29.1"
145/80R20 Tire Size in Inches
145/80R20 Tire Circumference
91.5"
20"
4.6"
692.3 revs/mile

145/80R20 Tire Overview

Height
29.1 inches
Wheel Diameter
20 inches
Tire Width
5.7 inches
Circumference
91.5 inches
Sidewall Height
4.6 inches
Revolutions
692.3 per mile
Tirelib.com

What does 145/80R20 mean?

145/80R20 tire size meaning in inches

145/80R20 is a tire size with the following dimensions:

  • 145 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.
  • 20 is the diameter of the wheel in inches, on which the tire is to be mounted.

145/80R20 Tire Conversion

DimensionsInchesMillimeters
Tire Diameter29.1 in740 mm
Section Width5.7 in145 mm
Rim Height20 in508 mm
Sidewall Height4.6 in116 mm
Circumference91.5 in2324.8 mm
Revolutions692.3 revs/mile
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FAQ About 145/80R20 Tire

How tall is a 145/80R20 tire?

The height (or diameter) of a 145/80R20 tire is 29.1 inches

How wide is a 145/80R20 tire?

The width of a 145/80R20 tire is 145 mm, which is about 5.7 inches.

What size rim fits a 145/80R20 tire?

A 145/80R20 tire fits on a rim that is 20 inches in diameter.

What does the 80 in a 145/80R20 tire mean?

The 80 in a 145/80R20 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 80% of its width.


Alternative Tire Sizes for 145/80R20

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 145/80R20:

Tire SizeDiameterRim
235/45R2028.3″ (-2.7%)20 x 7.5-9.0
235/50R2029.3″ (0.7%)20 x 6.5-8.5
245/45R2028.7″ (-1.4%)20 x 7.5-9.0
245/50R2029.6″ (1.7%)20 x 7.0-8.5
255/45R2029.0″ (-0.3%)20 x 8.0-9.5
265/40R2028.3″ (-2.7%)20 x 9.0-10.5
265/45R2029.4″ (1.0%)20 x 8.5-10.0
275/40R2028.7″ (-1.4%)20 x 9.0-11.0
275/45R2029.7″ (2.1%)20 x 8.5-10.5
285/40R2029.0″ (-0.3%)20 x 9.5-11.0
295/40R2029.3″ (0.7%)20 x 10.0-11.5
305/35R2028.4″ (-2.4%)20 x 10.0-12.0
305/40R2029.6″ (1.7%)20 x 10.0-12.0
315/35R2028.7″ (-1.4%)20 x 10.5-12.5
325/35R2029.0″ (-0.3%)20 x 11.0-13.0