305/30R20 in Inches

A 305/30R20 tire has a 27.2-inch diameter, a 12-inch width, and is designed for a 20-inch rim.

In high flotation terms, this tire is labeled as 27.2x12R20.

305/30R20 Tire Size
12"
27.2"
305/30R20 Tire Size in Inches
305/30R20 Tire Circumference
85.5"
20"
3.6"
741.3 revs/mile

305/30R20 Tire Overview

Height
27.2 inches
Wheel Diameter
20 inches
Tire Width
12 inches
Circumference
85.5 inches
Sidewall Height
3.6 inches
Revolutions
741.3 per mile
Tirelib.com

What does 305/30R20 mean?

305/30R20 tire size meaning in inches

305/30R20 is a tire size with the following dimensions:

  • 305 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.
  • 30 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.

305/30R20 Tire Conversion

DimensionsInchesMillimeters
Tire Diameter27.2 in691 mm
Section Width12 in305 mm
Rim Height20 in508 mm
Sidewall Height3.6 in91.5 mm
Circumference85.5 in2170.8 mm
Revolutions741.3 revs/mile
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FAQ About 305/30R20 Tire

How tall is a 305/30R20 tire?

The height (or diameter) of a 305/30R20 tire is 27.2 inches

How wide is a 305/30R20 tire?

The width of a 305/30R20 tire is 305 mm, which is about 12 inches.

What size rim fits a 305/30R20 tire?

A 305/30R20 tire fits on a rim that is 20 inches in diameter.

What does the 30 in a 305/30R20 tire mean?

The 30 in a 305/30R20 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 30% of its width.

Alternative Tire Sizes for 305/30R20

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 305/30R20:

Tire SizeDiameterRim
145/60R2026.9″ (-1.1%)20 x n/a
145/65R2027.4″ (0.7%)20 x n/a
155/60R2027.3″ (0.4%)20 x 4.5-5.5
155/65R2027.9″ (2.6%)20 x n/a
165/60R2027.8″ (2.2%)20 x n/a
175/55R2027.6″ (1.5%)20 x 5.0-6.0
195/50R2027.7″ (1.8%)20 x 5.5-7.0
215/45R2027.6″ (1.5%)20 x 7.0-8.0
225/40R2027.1″ (-0.4%)20 x 7.5-9.0
225/45R2028.0″ (2.9%)20 x 8.0-9.5
235/35R2026.5″ (-2.6%)20 x 8.0-9.5
235/40R2027.4″ (0.7%)20 x 8.0-9.5
245/35R2026.8″ (-1.5%)20 x 8.0-9.5
245/40R2027.7″ (1.8%)20 x 8.0-9.5
255/35R2027.0″ (-0.7%)20 x 8.5-10.0
255/40R2028.0″ (2.9%)20 x 8.5-10.0
265/35R2027.3″ (0.4%)20 x 9.0-10.5
275/30R2026.5″ (-2.6%)20 x 9.0-10.0
275/35R2027.6″ (1.5%)20 x 9.0-11.0
285/30R2026.7″ (-1.8%)20 x 9.5-10.5
285/35R2027.9″ (2.6%)20 x 9.5-11.0
295/30R2027.0″ (-0.7%)20 x 10.0-11.0
315/30R2027.4″ (0.7%)20 x 10.5-11.5
325/25R2026.4″ (-2.9%)20 x 11.5-12.5
325/30R2027.7″ (1.8%)20 x 11.0-12.0
335/25R2026.6″ (-2.2%)20 x 11.5-12.5
335/30R2027.9″ (2.6%)20 x 11.5-12.5
345/25R2026.8″ (-1.5%)20 x 12.0-13.0