255/60R18 in inches
A 255/60R18 tire stands 30.0 inches tall and is 10.0 inches wide. It fits an 18-inch wheel. People usually call it a 30-inch tire.
Tall
30.0″
763 mm
Wide
10.0″
255 mm
Wheel
18″
rim diameter
Cars that come with 255/60R18
Similar-height sizes
Within 3% of 255/60R18, so your speedometer stays close.
| Size | Height | vs 255/60R18 | |
|---|---|---|---|
| 255/70R16 | 30.1″ | +0.0%needs 16″ wheels | Compare |
| 255/50R20 | 30.0″ | −0.0%needs 20″ wheels | Compare |
| 235/65R18 | 30.0″ | −0.1% | Compare |
| 235/55R20 | 30.2″ | +0.4%needs 20″ wheels | Compare |
| 265/50R20 | 30.4″ | +1.3%needs 20″ wheels | Compare |
| 245/50R20 | 29.6″ | −1.3%needs 20″ wheels | Compare |
| 295/45R20 | 30.5″ | +1.3%needs 20″ wheels | Compare |
| 245/75R16 | 30.5″ | +1.4%needs 16″ wheels | Compare |
How 255/60R18 is measured
| Measurement | Inches | Millimetres |
|---|---|---|
| Overall height (diameter) | 30.05 | 763 |
| Tread width | 10.04 | 255 |
| Sidewall height | 6.02 | 153 |
| Distance per turn (circumference) | 94.4 | 2398 |
| Turns per mile | 671 | |
The first number (255) is the width in millimetres. The second (60) means the sidewall is 60% as tall as the tire is wide. The last (18) is the wheel size in inches. More on reading a tire size.