305/45R22 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:
| 305 | The tire width is 305mm. |
| 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. |
| 22 | Rim diameter for the tire. 305/45R22 tire can be mounted only to a 22″ rims. |
Best selling 305/45R22 tires
Nitto NT420V- 305/45R22 118H XL
(as of December 10, 2023 08:34 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.)
Venom Power Terra Hunter R/T+ R/T Truck/SUV All-Terrain Mud Off-Road Radial Tire-305/45R22 305/45/22 305/45-22 118T Load Range XL 4-Ply BSW Black Side Wall
(as of December 10, 2023 08:34 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.)
Fullway HS266 All-Season Truck/SUV Performance Radial Tire-305/45R22 305/45/22 305/45-22 118V Load Range XL 4-Ply BSW Black Side Wall UTQG 420AA
18% Off(as of December 10, 2023 08:34 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 305/45R22 tire size in inches?
Because the width of 305/45R22 tire is stated in millimeters and sidewall height in percentages, you have to make calculations to see what the true size of 305/45R22 is in inches. Luckily, we have made these calculations for you.In this table you can see size of 305/45R22 in inches, as well as few additional metrics:
| In inches | In millimeters | |
| Section Width | 12.0″ | 305mm |
| Sidewall height | 5.4″ | 137mm |
| Diameter / Height | 32.8″ | 833mm |
| Circumference | 103.1″ | 2618mm |
| Rim Diameter | 22″ | |
| Revolutions | 615 per mile | 382 per kilometer |
Recommended Rim Sizes for 305/45R22 Tires
For 305/45R22 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 305/45R22 to a too wide or too narrow rim. Here are the recommended rim sizes for 305/45R22 tire:
| Diameter | Width Range |
| 22″ | 9.5-11.5″ |
305/45R22 – Variations
When you look at the tire code on 305/45R22 tires, you may see there are additional numbers and letters after the code 305/45R22. These numbers and letters refer to speed rating and load index of the tire. 305/45R22 has at least following variations available on the markets:
305/45R22 118H 305/45R22 118S 305/45R22 118T 305/45R22 118V 305/45R22 118W