235/60R18 tire size in inches
A 235/60R18 tire measures
29.1" tall × 9.3" wide
5.55" sidewall on a 18" wheel. 693 revolutions per mile.
235/60R18 means a tire 235 mm wide, with sidewalls 60% as tall as the tire is wide (141 mm), radial construction (R), for a 18 inch wheel.
235/60R18 specs
| Overall diameter (height) | 29.10 inches (739 mm) |
|---|---|
| Section width | 9.25 inches (235 mm) |
| Sidewall height | 5.55 inches (141 mm) |
| Wheel (rim) diameter | 18 inches |
| Circumference | 91.4 inches (2,322 mm) |
| Revolutions per mile | 693 |
| Revolutions per kilometer | 431 |
| Approximate rim width | 6.0" to 7.5" |
| In inches (flotation style) | 29.1x9.3R18 |
| Aspect ratio | 60% |
Calculated from the size. Real tires differ by brand, model and tread depth, typically by a few tenths of an inch.
Sizes that can replace 235/60R18 on a 18" wheel
These 18" sizes are within 3% of 235/60R18's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 255/55R18 | 29.04" | 10.04" | −0.2% | 59.9 mph | Compare |
| 315/45R18 | 29.16" | 12.40" | +0.2% | 60.1 mph | Compare |
| 215/65R18 | 29.00" | 8.46" | −0.3% | 59.8 mph | Compare |
| 285/50R18 | 29.22" | 11.22" | +0.4% | 60.2 mph | Compare |
| 205/70R18 | 29.30" | 8.07" | +0.7% | 60.4 mph | Compare |
| 275/50R18 | 28.83" | 10.83" | −0.9% | 59.4 mph | Compare |
| 305/45R18 | 28.81" | 12.01" | −1.0% | 59.4 mph | Compare |
| 195/70R18 | 28.75" | 7.68" | −1.2% | 59.3 mph | Compare |
| 265/55R18 | 29.48" | 10.43" | +1.3% | 60.8 mph | Compare |
| 195/75R18 | 29.52" | 7.68" | +1.4% | 60.9 mph | Compare |
| 225/65R18 | 29.52" | 8.86" | +1.4% | 60.9 mph | Compare |
| 325/45R18 | 29.52" | 12.80" | +1.4% | 60.9 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 285/45R19 | 19" | 29.10" | 0.0% | Compare |
| 205/75R17 | 17" | 29.11" | 0.0% | Compare |
| 275/65R15 | 15" | 29.07" | −0.1% | Compare |
| 295/35R21 | 21" | 29.13" | +0.1% | Compare |
| 225/85R14 | 14" | 29.06" | −0.1% | Compare |
| 255/75R14 | 14" | 29.06" | −0.1% | Compare |
| 255/70R15 | 15" | 29.06" | −0.2% | Compare |
| 345/30R21 | 21" | 29.15" | +0.2% | Compare |
| 195/85R16 | 16" | 29.05" | −0.2% | Compare |
| 255/65R16 | 16" | 29.05" | −0.2% | Compare |
| 255/60R17 | 17" | 29.05" | −0.2% | Compare |
| 215/60R19 | 19" | 29.16" | +0.2% | Compare |
One size up or down
- 225/60R18narrower: 28.6" × 8.9"
- 245/60R18wider: 29.6" × 9.6"
- 235/55R18lower profile: 28.2" × 9.3"
- 235/65R18taller sidewall: 30.0" × 9.3"
Compare 235/60R18 with another size
Questions
- How tall is a 235/60R18 tire?
- A 235/60R18 tire is 29.1 inches tall (739 mm), calculated from the size. It is 9.3 inches wide with 5.6 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 235/60R18 mean?
- 235/60R18 means a tire 235 mm wide, with sidewalls 60% as tall as the tire is wide (141 mm), radial construction (R), for a 18 inch wheel.
- How many revolutions per mile does a 235/60R18 tire make?
- About 693 revolutions per mile, based on a circumference of 91.4 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 235/60R18 tire?
- Roughly 6.0" to 7.5". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 255/55R18 instead of 235/60R18?
- 255/55R18 is −0.06 inches (−0.2%) in overall diameter, so at an indicated 60 mph you would be doing 59.9 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.