245/40R20 in Inches

A 245/40R20 tire has a 27.7-inch diameter, a 9.6-inch width, and is designed for a 20-inch rim.

In high flotation terms, this tire is labeled as 27.7x9.6R20.

245/40R20 Tire Size
9.6"
27.7"
245/40R20 Tire Size in Inches
245/40R20 Tire Circumference
87.1"
20"
3.9"
727.7 revs/mile

245/40R20 Tire Overview

Height
27.7 inches
Wheel Diameter
20 inches
Tire Width
9.6 inches
Circumference
87.1 inches
Sidewall Height
3.9 inches
Revolutions
727.7 per mile
Tirelib.com

What does 245/40R20 mean?

245/40R20 tire size meaning in inches

245/40R20 is a tire size with the following dimensions:

  • 245 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.
  • 40 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.

245/40R20 Tire Conversion

DimensionsInchesMillimeters
Tire Diameter27.7 in704 mm
Section Width9.6 in245 mm
Rim Height20 in508 mm
Sidewall Height3.9 in98 mm
Circumference87.1 in2211.7 mm
Revolutions727.7 revs/mile
Not the tire size you are searching for? Try our Tire Size Calculator.

FAQ About 245/40R20 Tire

How tall is a 245/40R20 tire?

The height (or diameter) of a 245/40R20 tire is 27.7 inches

How wide is a 245/40R20 tire?

The width of a 245/40R20 tire is 245 mm, which is about 9.6 inches.

What size rim fits a 245/40R20 tire?

A 245/40R20 tire fits on a rim that is 20 inches in diameter.

What does the 40 in a 245/40R20 tire mean?

The 40 in a 245/40R20 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 40% of its width.

Alternative Tire Sizes for 245/40R20

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 245/40R20:

Tire SizeDiameterRim
195/50R2027.7″ (Equal)20 x 5.5-7.0
325/30R2027.7″ (Equal)20 x 11.0-12.0
145/60R2026.9″ (-2.9%)20 x n/a
145/65R2027.4″ (-1.1%)20 x n/a
155/60R2027.3″ (-1.4%)20 x 4.5-5.5
155/65R2027.9″ (0.7%)20 x n/a
165/60R2027.8″ (0.4%)20 x n/a
175/55R2027.6″ (-0.4%)20 x 5.0-6.0
215/45R2027.6″ (-0.4%)20 x 7.0-8.0
225/40R2027.1″ (-2.2%)20 x 7.5-9.0
225/45R2028.0″ (1.1%)20 x 8.0-9.5
235/40R2027.4″ (-1.1%)20 x 8.0-9.5
235/45R2028.3″ (2.2%)20 x 7.5-9.0
255/35R2027.0″ (-2.5%)20 x 8.5-10.0
255/40R2028.0″ (1.1%)20 x 8.5-10.0
265/35R2027.3″ (-1.4%)20 x 9.0-10.5
265/40R2028.3″ (2.2%)20 x 9.0-10.5
275/35R2027.6″ (-0.4%)20 x 9.0-11.0
285/35R2027.9″ (0.7%)20 x 9.5-11.0
295/30R2027.0″ (-2.5%)20 x 10.0-11.0
295/35R2028.1″ (1.4%)20 x 10.0-11.5
305/30R2027.2″ (-1.8%)20 x 10.5-11.5
305/35R2028.4″ (2.5%)20 x 10.0-12.0
315/30R2027.4″ (-1.1%)20 x 10.5-11.5
335/30R2027.9″ (0.7%)20 x 11.5-12.5
345/30R2028.1″ (1.4%)20 x 12.0-13.0