What is the Actual Width of a Tire in Size 215/75R14

Updated 03/05/2014 | Published 03/02/2014

Question:

Can you tell me how wide a 215/75R14 is

asked by: Pierce B

Helpful Expert Reply:

Thank you for the photo of your vintage travel trailer. Your tire is 215 millimeters, or 8.471 inches wide.

The metric type of tire size designation such as what you provided, 215/75R14, includes several bits of information about the tire.

The first number, 215, is the width of the tire between the widest points of its inner and outer sidewalls. This is expressed in millimeters. So your tire is 215 millimeters wide, or 8.471 inches wide.

The second number in your tire size, 75, is the aspect ratio or section height. This is expressed as a percentage of the tire width. So your tire aspect ratio is 75 percent of its width, or 161 millimeters, or 6.35 inches.

The R in your tire size refers to it being a radial-type tire and the 14 refers to the rim diameter in inches.

The linked article offers more detail about tire sizes and types.

expert reply by: Adam R