315/70R20 in Inches

A 315/70R20 tire has a 37.4-inch diameter, a 12.4-inch width, and is designed for a 20-inch rim.

In high flotation terms, this tire is labeled as 37.4x12.4R20.

315/70R20 Tire Size
315/70R20 Tire Size in Inches
315/70R20 Tire Circumference
539.8 revs/mile

315/70R20 Tire Overview

37.4 inches
Wheel Diameter
20 inches
Tire Width
12.4 inches
117.4 inches
Sidewall Height
8.7 inches
539.8 per mile

What does 315/70R20 mean?

315/70R20 tire size meaning in inches

315/70R20 is a tire size with the following dimensions:

  • 315 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.
  • 20 is the diameter of the wheel in inches, on which the tire is to be mounted.

315/70R20 Tire Conversion

Tire Diameter37.4 in949 mm
Section Width12.4 in315 mm
Rim Height20 in508 mm
Sidewall Height8.7 in220.5 mm
Circumference117.4 in2981.4 mm
Revolutions539.8 revs/mile
Not the tire size you are searching for? Try our Tire Size Calculator.

FAQ About 315/70R20 Tire

How tall is a 315/70R20 tire?

The height (or diameter) of a 315/70R20 tire is 37.4 inches

How wide is a 315/70R20 tire?

The width of a 315/70R20 tire is 315 mm, which is about 12.4 inches.

What size rim fits a 315/70R20 tire?

A 315/70R20 tire fits on a rim that is 20 inches in diameter.

What does the 70 in a 315/70R20 tire mean?

The 70 in a 315/70R20 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 70% of its width.

Alternative Tire Sizes for 315/70R20

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 315/70R20:

Tire SizeDiameterRim
355/60R2036.8″ (-1.6%)20 x 8.0-9.5