View the Sizing Chart for the Avon 18″ Radial Slicks
| TYRE SIZE | RIM CHOICE | RIM | PSI | BAR | DIA INS | DIA MM | SECTION INS | SECTION MM | TREAD INS | TREAD MM | MILES | KM |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 210/640R18 | TBC | 8 | 29 | 2 | 25.5 | 648 | 8.94 | 227 | 8.39 | 213 | 791 | 491 |
| 225/640R18 | 8.0 - 9.0 | 9 | 29 | 2 | 25.5 | 648 | 10.1 | 257 | 8.8 | 226 | 790 | 491 |
| 240/640R18 | 8.5 - 9.5 | 9 | 29 | 2 | 25.4 | 645 | 10.8 | 274 | 9.4 | 239 | 794 | 493 |
| 250/640R18 | 9.5 - 10.5 | 10 | 29 | 2 | 25.4 | 645 | 11.2 | 284 | 9.9 | 251 | 794 | 493 |
| 335/645R18 | 12.5 - 13.5 | 12 | 29 | 2 | 25.75 | 654 | 13.3 | 338 | 13 | 330 | 783 | 487 |
| 270/650R18 | 10.0 - 11.0 | 11 | 29 | 2 | 25.8 | 656 | 11.9 | 302 | 10.7 | 272 | 782 | 486 |
| 300/650R18 | 11.0 - 12.5 | 12 | 29 | 2 | 25.7 | 653 | 13 | 329 | 12 | 304 | 785 | 488 |
| 270/680R18 | 10.5 - 11.5 | 11 | 29 | 2 | 26.9 | 683 | 11.75 | 298 | 10.25 | 260 | 750 | 466 |
| 285/680R18 | 11.0 - 12.0 | 11 | 29 | 2 | 27 | 685 | 11.9 | 302 | 11 | 279 | 747 | 464 |
| 300/680R18 | 12.0 - 13.0 | 12 | 29 | 2 | 26.85 | 682 | 13 | 330 | 12 | 305 | 751 | 467 |
| 280/705R18 | 11.0 - 12.0 | 11 | 29 | 2 | 27.8 | 706 | 12.1 | 307 | 10.85 | 276 | 725 | 451 |
| 320/705R18 | 13.0 - 14.0 | 13 | 29 | 2 | 27.8 | 706 | 13.85 | 352 | 12.55 | 319 | 725 | 451 |
| 365/720R18 | 14.5 - 16.0 | 14.5 | 29 | 2 | 28.39 | 721 | 15.94 | 405 | 14.37 | 365 | 710 | 441 |