235/45R21 in Inches

A 235/45R21 tire has a 29.3-inch diameter, a 9.3-inch width, and is designed for a 21-inch rim.

In high flotation terms, this tire is labeled as 29.3x9.3R21.

235/45R21 Tire Size
9.3"
29.3"
235/45R21 Tire Size in Inches
235/45R21 Tire Circumference
92.1"
21"
4.2"
687.7 revs/mile

235/45R21 Tire Overview

Height
29.3 inches
Wheel Diameter
21 inches
Tire Width
9.3 inches
Circumference
92.1 inches
Sidewall Height
4.2 inches
Revolutions
687.7 per mile
Tirelib.com

What does 235/45R21 mean?

235/45R21 tire size meaning in inches

235/45R21 is a tire size with the following dimensions:

  • 235 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.
  • 45 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.
  • 21 is the diameter of the wheel in inches, on which the tire is to be mounted.

235/45R21 Tire Conversion

DimensionsInchesMillimeters
Tire Diameter29.3 in744.9 mm
Section Width9.3 in235 mm
Rim Height21 in533 mm
Sidewall Height4.2 in105.8 mm
Circumference92.1 in2340.2 mm
Revolutions687.7 revs/mile
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FAQ About 235/45R21 Tire

How tall is a 235/45R21 tire?

The height (or diameter) of a 235/45R21 tire is 29.3 inches

How wide is a 235/45R21 tire?

The width of a 235/45R21 tire is 235 mm, which is about 9.3 inches.

What size rim fits a 235/45R21 tire?

A 235/45R21 tire fits on a rim that is 21 inches in diameter.

What does the 45 in a 235/45R21 tire mean?

The 45 in a 235/45R21 tire refers to the aspect ratio, meaning the height of the tire's sidewall is 45% of its width.


Alternative Tire Sizes for 235/45R21

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 235/45R21:

Tire SizeDiameterRim
265/40R2129.3″ (Equal)21 x 9.0-10.5
245/40R2128.7″ (-2.0%)21 x 8.0-9.5
245/45R2129.7″ (1.4%)21 x 7.5-9.0
255/40R2129.0″ (-1.0%)21 x 8.5-10.0
255/45R2130.0″ (2.4%)21 x 9.5-11.0
275/35R2128.6″ (-2.4%)21 x 9.0-11.0
275/40R2129.7″ (1.4%)21 x 9.0-11.0
285/35R2128.9″ (-1.4%)21 x 9.5-11.0
285/40R2130.0″ (2.4%)21 x 9.5-11.0
295/35R2129.1″ (-0.7%)21 x 10.0-11.5
305/35R2129.4″ (0.3%)21 x 10.0-12.0
315/35R2129.7″ (1.4%)21 x 10.5-12.5
325/30R2128.7″ (-2.0%)21 x 11.0-12.0