235/65R18 in inches
A 235/65R18 tire stands 30.0 inches tall and is 9.3 inches wide. It fits an 18-inch wheel. People usually call it a 30-inch tire.
Tall
30.0″
763 mm
Wide
9.3″
235 mm
Wheel
18″
rim diameter
Cars that come with 235/65R18
Similar-height sizes
Within 3% of 235/65R18, so your speedometer stays close.
| Size | Height | vs 235/65R18 | |
|---|---|---|---|
| 255/50R20 | 30.0″ | +0.0%needs 20″ wheels | Compare |
| 255/60R18 | 30.0″ | +0.1% | Compare |
| 255/70R16 | 30.1″ | +0.1%needs 16″ wheels | Compare |
| 235/55R20 | 30.2″ | +0.5%needs 20″ wheels | Compare |
| 245/50R20 | 29.6″ | −1.3%needs 20″ wheels | Compare |
| 265/50R20 | 30.4″ | +1.4%needs 20″ wheels | Compare |
| 245/55R19 | 29.6″ | −1.4%needs 19″ wheels | Compare |
| 295/45R20 | 30.5″ | +1.4%needs 20″ wheels | Compare |
How 235/65R18 is measured
| Measurement | Inches | Millimetres |
|---|---|---|
| Overall height (diameter) | 30.03 | 763 |
| Tread width | 9.25 | 235 |
| Sidewall height | 6.01 | 153 |
| Distance per turn (circumference) | 94.3 | 2396 |
| Turns per mile | 672 | |
The first number (235) is the width in millimetres. The second (65) means the sidewall is 65% as tall as the tire is wide. The last (18) is the wheel size in inches. More on reading a tire size.