175/55R16 Tires & Tire Size

175/55R16 refers to the size of the tire. It’s a standard which is used by car and tire manufacturers. By having the standard, tire manufacturers are able to manufacture same size tires independently and users can buy same size tires from different manufacturers.

Here’s an explanation of what these metrics mean in practice:

175 The tire width is 175mm.
55 The aspect ratio of the tire is 55. Aspect ratio refers to the height of tire sidewall in relation to tire width in percentages.
R The letter in the middle refers to tire construction. Practically all tires sold for cars are radials.
Sometimes you also see tires with RF or ZR. RF indicates the tire is run flat, whereas ZR means the tire has speed rating higher than V. These tires are also radials, as the R indicates.
16 Rim diameter for the tire. 175/55R16 tire can be mounted only to a 16″ rims.

Best selling 175/55R16 tires

What is 175/55R16 tire size in inches?

Because the width of 175/55R16 tire is stated in millimeters and sidewall height in percentages, you have to make calculations to see what the true size of 175/55R16 is in inches. Luckily, we have made these calculations for you.In this table you can see size of 175/55R16 in inches, as well as few additional metrics:

  In inches In millimeters
Section Width 6.9″ 175mm
Sidewall height 3.8″ 96mm
Diameter / Height 23.6″ 599mm
Circumference 74.1″ 1881mm
Rim Diameter  16″  
Revolutions  855 per mile  531 per kilometer

Recommended Rim Sizes for 175/55R16 Tires

For 175/55R16 tires you need to have correct size rims to install the tires to. There are different width rims available in the market, and you can run into problems by installing 175/55R16 to a too wide or too narrow rim. Here are the recommended rim sizes for 175/55R16 tire:

Diameter Width Range
16″ 5-6″

175/55R16 – Variations

When you look at the tire code on 175/55R16 tires, you may see there are additional numbers and letters after the code 175/55R16. These numbers and letters refer to speed rating and load index of the tire. 175/55R16 has at least following variations available on the markets:

175/55R16 80W
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