265/45R20 Tires & Tire Size

265/45R20 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:

265 The tire width is 265mm.
45 The aspect ratio of the tire is 45. 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.
20 Rim diameter for the tire. 265/45R20 tire can be mounted only to a 20″ rims.

Best selling 265/45R20 tires

What is 265/45R20 tire size in inches?

Because the width of 265/45R20 tire is stated in millimeters and sidewall height in percentages, you have to make calculations to see what the true size of 265/45R20 is in inches. Luckily, we have made these calculations for you.In this table you can see size of 265/45R20 in inches, as well as few additional metrics:

  In inches In millimeters
Section Width 10.4″ 265mm
Sidewall height 4.7″ 119mm
Diameter / Height 29.4″ 747mm
Circumference 92.3″ 2345mm
Rim Diameter  20″  
Revolutions  686 per mile  426 per kilometer

Recommended Rim Sizes for 265/45R20 Tires

For 265/45R20 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 265/45R20 to a too wide or too narrow rim. Here are the recommended rim sizes for 265/45R20 tire:

Diameter Width Range
20″ 8.5-10″

265/45R20 – Variations

When you look at the tire code on 265/45R20 tires, you may see there are additional numbers and letters after the code 265/45R20. These numbers and letters refer to speed rating and load index of the tire. 265/45R20 has at least following variations available on the markets:

265/45R20 108H 265/45R20 108T 265/45R20 108V 265/45R20 108W 265/45R20 108Y 265/45R20 104H 265/45R20 104V 265/45R20 104W 265/45R20 104Y