Tire size chart
Common car, SUV and pickup sizes, with the real dimensions in inches. Each number is calculated from the size itself. Tap a size to see its details and tires listed on eBay.
| Size | Diameter, in | Width, in | Sidewall, in | Revs per mile |
|---|---|---|---|---|
| 185/65R15 | 24.5 | 7.3 | 4.7 | 824 |
| 195/65R15 | 25.0 | 7.7 | 5.0 | 807 |
| 235/75R15 | 28.9 | 9.3 | 6.9 | 698 |
| 205/55R16 | 24.9 | 8.1 | 4.4 | 811 |
| 205/60R16 | 25.7 | 8.1 | 4.8 | 785 |
| 215/60R16 | 26.2 | 8.5 | 5.1 | 771 |
| 215/65R16 | 27.0 | 8.5 | 5.5 | 747 |
| 225/60R16 | 26.6 | 8.9 | 5.3 | 757 |
| 245/75R16 | 30.5 | 9.6 | 7.2 | 662 |
| 265/70R16 | 30.6 | 10.4 | 7.3 | 659 |
| 265/75R16 | 31.6 | 10.4 | 7.8 | 637 |
| 285/75R16 | 32.8 | 11.2 | 8.4 | 614 |
| 215/55R17 | 26.3 | 8.5 | 4.7 | 767 |
| 225/45R17 | 25.0 | 8.9 | 4.0 | 808 |
| 225/50R17 | 25.9 | 8.9 | 4.4 | 780 |
| 225/55R17 | 26.7 | 8.9 | 4.9 | 754 |
| 225/60R17 | 27.6 | 8.9 | 5.3 | 730 |
| 225/65R17 | 28.5 | 8.9 | 5.8 | 707 |
| 235/65R17 | 29.0 | 9.3 | 6.0 | 695 |
| 265/65R17 | 30.6 | 10.4 | 6.8 | 660 |
| 265/70R17 | 31.6 | 10.4 | 7.3 | 638 |
| 285/70R17 | 32.7 | 11.2 | 7.9 | 617 |
| 225/55R18 | 27.7 | 8.9 | 4.9 | 727 |
| 235/45R18 | 26.3 | 9.3 | 4.2 | 766 |
| 235/55R18 | 28.2 | 9.3 | 5.1 | 716 |
| 235/60R18 | 29.1 | 9.3 | 5.6 | 693 |
| 245/45R18 | 26.7 | 9.6 | 4.3 | 756 |
| 245/60R18 | 29.6 | 9.6 | 5.8 | 682 |
| 255/55R18 | 29.0 | 10.0 | 5.5 | 694 |
| 255/70R18 | 32.1 | 10.0 | 7.0 | 629 |
| 265/60R18 | 30.5 | 10.4 | 6.3 | 661 |
| 275/65R18 | 32.1 | 10.8 | 7.0 | 629 |
| 235/55R19 | 29.2 | 9.3 | 5.1 | 691 |
| 275/55R20 | 31.9 | 10.8 | 6.0 | 632 |
| 275/60R20 | 33.0 | 10.8 | 6.5 | 611 |
How it is calculated: sidewall = width x aspect ratio / 100; diameter = wheel diameter + 2 sidewalls; revolutions per mile = one mile / circumference. Real tires vary slightly by brand, tread and inflation.
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