225/75R15 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:
| 225 | The tire width is 225mm. |
| 75 | The aspect ratio of the tire is 75. 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. |
| 15 | Rim diameter for the tire. 225/75R15 tire can be mounted only to a 15″ rims. |
Best selling 225/75R15 tires
Hankook Kinergy ST H735 All-Season Radial Tire - 225/75R15 102T
19% Off(as of June 7, 2023 23:40 GMT +00:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
Carlisle Radial Trail HD Trailer Tire - 225/75R15
19% Off(as of June 7, 2023 23:40 GMT +00:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
ST225/75R15 Radial Trailer Tire, 225 75R15 Tire with Rim, 10-Ply Load Range E，2 Pack
(as of June 7, 2023 23:40 GMT +00:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
What is 225/75R15 tire size in inches?
Because the width of 225/75R15 tire is stated in millimeters and sidewall height in percentages, you have to make calculations to see what the true size of 225/75R15 is in inches. Luckily, we have made these calculations for you.In this table you can see size of 225/75R15 in inches, as well as few additional metrics:
| In inches | In millimeters | |
| Section Width | 8.9″ | 225mm |
| Sidewall height | 6.6″ | 169mm |
| Diameter / Height | 28.3″ | 719mm |
| Circumference | 88.9″ | 2257mm |
| Rim Diameter | 15″ | |
| Revolutions | 713 per mile | 443 per kilometer |
Recommended Rim Sizes for 225/75R15 Tires
For 225/75R15 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 225/75R15 to a too wide or too narrow rim. Here are the recommended rim sizes for 225/75R15 tire:
| Diameter | Width Range |
| 15″ | 6-7.5″ |
225/75R15 – Variations
When you look at the tire code on 225/75R15 tires, you may see there are additional numbers and letters after the code 225/75R15. These numbers and letters refer to speed rating and load index of the tire. 225/75R15 has at least following variations available on the markets:
225/75R15 102Q 225/75R15 102S 225/75R15 102T