115/70R15 in Inches

A 115/70R15 tire has a 21.3-inch diameter, a 4.5-inch width, and is designed for a 15-inch rim.

In high flotation terms, this tire is labeled as 21.3x4.5R15.

115/70R15 Tire Size
115/70R15 Tire Size in Inches
115/70R15 Tire Circumference
945.1 revs/mile

115/70R15 Tire Overview

21.3 inches
Wheel Diameter
15 inches
Tire Width
4.5 inches
67 inches
Sidewall Height
3.2 inches
945.1 per mile

What does 115/70R15 mean?

115/70R15 tire size meaning in inches

115/70R15 is a tire size with the following dimensions:

  • 115 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.
  • 15 is the diameter of the wheel in inches, on which the tire is to be mounted.

115/70R15 Tire Conversion

Tire Diameter21.3 in542 mm
Section Width4.5 in115 mm
Rim Height15 in381 mm
Sidewall Height3.2 in80.5 mm
Circumference67 in1702.7 mm
Revolutions945.1 revs/mile
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FAQ About 115/70R15 Tire

How tall is a 115/70R15 tire?

The height (or diameter) of a 115/70R15 tire is 21.3 inches

How wide is a 115/70R15 tire?

The width of a 115/70R15 tire is 115 mm, which is about 4.5 inches.

What size rim fits a 115/70R15 tire?

A 115/70R15 tire fits on a rim that is 15 inches in diameter.

What does the 70 in a 115/70R15 tire mean?

The 70 in a 115/70R15 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 70% of its width.

Alternative Tire Sizes for 115/70R15

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 115/70R15:

Tire SizeDiameterRim
105/70R1520.8″ (-2.3%)15 x n/a
125/70R1521.9″ (2.8%)15 x n/a
165/45R1520.8″ (-2.3%)15 x 5.0-6.0
165/50R1521.5″ (0.9%)15 x 4.5-6.0
175/50R1521.9″ (2.8%)15 x 5.0-6.0
185/45R1521.6″ (1.4%)15 x 6.0-7.0
195/45R1521.9″ (2.8%)15 x 6.0-7.5
215/40R1521.8″ (2.3%)15 x 7.0-8.5
245/35R1521.8″ (2.3%)15 x 8.0-9.5