255/35R18 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:
| 255 | The tire width is 255mm. |
| 35 | The aspect ratio of the tire is 35. 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. |
| 18 | Rim diameter for the tire. 255/35R18 tire can be mounted only to a 18″ rims. |
Best selling 255/35R18 tires
Accelera Phi 255/35R18XL 94Y BSW
16% Off(as of December 11, 2023 01:33 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.)
Set of 2 (TWO) Cosmo MuchoMacho All-Season Passenger Car High Performance Radial Tires-255/35R18 255/35ZR18 255/35/18 255/35-18 94Y Load Range XL 4-Ply BSW Black Side Wall UTQG 300AAA
(as of December 11, 2023 01:33 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.)
Pirelli PZero All Season Plus Street Radial Tire-255/35R18XL 94Y
10% Off(as of December 11, 2023 01:33 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 255/35R18 tire size in inches?
Because the width of 255/35R18 tire is stated in millimeters and sidewall height in percentages, you have to make calculations to see what the true size of 255/35R18 is in inches. Luckily, we have made these calculations for you.In this table you can see size of 255/35R18 in inches, as well as few additional metrics:
| In inches | In millimeters | |
| Section Width | 10.0″ | 255mm |
| Sidewall height | 3.5″ | 89mm |
| Diameter / Height | 25.0″ | 636mm |
| Circumference | 78.6″ | 1997mm |
| Rim Diameter | 18″ | |
| Revolutions | 806 per mile | 501 per kilometer |
Recommended Rim Sizes for 255/35R18 Tires
For 255/35R18 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 255/35R18 to a too wide or too narrow rim. Here are the recommended rim sizes for 255/35R18 tire:
| Diameter | Width Range |
| 18″ | 8.5-10″ |
255/35R18 – Variations
When you look at the tire code on 255/35R18 tires, you may see there are additional numbers and letters after the code 255/35R18. These numbers and letters refer to speed rating and load index of the tire. 255/35R18 has at least following variations available on the markets:
255/35R18 90H 255/35R18 90V 255/35R18 90W 255/35R18 90Y 255/35R18 94H 255/35R18 94V 255/35R18 94W 255/35R18 94Y